Broiler low-protein daily ration prepared from peas instead of corn and soybean meal and application of broiler low-protein daily ration
By measuring the net energy and amino acid digestibility of peas, an accurate feed formula was established, and 10% peas were used to replace corn-soybean meal-type basic diet, the problem of reducing corn and soybean meal in broiler feed was solved, and the growth and slaughtering performance of broiler chickens was improved.
Patent Information
- Application Number
- CN202411722098.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-03-25
AI Technical Summary
The prior art is difficult to effectively replace corn and soybean meal in broiler feed, which makes it difficult to reduce the amount of corn and soybean meal replacement. Peas as alternative raw materials have problems with starch type and anti-nutrition factors, which affects the growth performance of broiler.
By measuring the net energy of peas and the digestibility of standard ileal amino acids, an accurate feed formula is established, and 10% peas are used to replace the basic diet of corn-soybean meal to ensure the demand for net energy and amino acid digestibility in low-protein diets, and reduce the amount of corn and soybean meal.
The preparation of low-protein diet for broilers has been achieved, the growth and slaughtering performance of broilers has been improved, intestinal health has been ensured, and the goal of reducing and replacing corn and soybean meal has been achieved.
Smart Images
Figure SMS_1 
Figure SMS_2 
Figure SMS_3
Abstract
Description
Technical Field
[0001] The invention relates to the field of poultry feed processing, in particular to a low-protein broiler diet prepared by replacing corn and soybean meal with peas and application thereof. Background Art
[0002] How to achieve reduced amount of corn and soybean meal substitution in broiler feed is a major technical issue we are currently facing.
[0003] The best way to reduce the amount of soybean meal is to use low-protein diet technology, that is, to reduce the crude protein level of the diet by about 2 percentage points through amino acid balance technology to form a low-protein diet. Since the crude protein content of conventional soybean meal is 43%, a 2 percentage point reduction in the crude protein level of the diet is equivalent to a reduction of less than 5% in soybean meal (2% / 43%=4.65%), which is a big difference from the 30% soybean meal used in the conventional corn-soybean meal diet for broilers. A 5% reduction requires about 25% soybean meal. In addition, the reduction in soybean meal usage requires the use of energy feed, namely corn, to fill the space left by the reduction in soybean meal, resulting in an increase in corn usage. In other words, simply using low-protein diet technology cannot achieve a reduction in corn and soybean meal substitution.
[0004] Corn is an energy feed and soybean meal is a protein feed. Corn and soybean meal reduction substitution means using energy or protein feed other than corn and soybean meal to replace corn and soybean meal in the formula, so as to achieve the goal of corn and soybean meal reduction substitution.
[0005] Protein feed refers to feed with a natural moisture content of less than 45%, a crude fiber content of less than 18% in dry matter, and a crude protein content of greater than or equal to 20%. At present, the commonly used protein feeds for poultry mainly include beans, cakes and dregs, etc. Peas are leguminous plants with protein and starch as the main nutrients. Their crude protein content is more than 20%, and their starch content is more than 40%. The nutritional value is between soybean meal and corn. In the current promotion of corn to replace soybean meal reduction technology, peas can be used as a substitute feed raw material for corn and soybean meal in poultry feed. However, the starch type of peas belongs to large-granule starch, which will affect digestion. In addition, peas contain a variety of anti-nutritional factors, including tannins, phytic acid phosphorus, lectins, trypsin inhibitors and non-starch polysaccharides. These anti-nutritional factors will affect the utilization efficiency of nutrients in peas in poultry, thereby affecting the growth performance of animals. Therefore, the proportion of peas added to the diet will affect the growth and development of broilers. Although there have been relevant reports on the research of peas in broiler diets, the research purposes are different and the results are different. Some of them even reduce the growth performance of broilers, and do not involve the issue of low-protein diets and corn and soybean meal reduction. A very important reason is the lack of accurate evaluation of the effective performance of peas. Therefore, how to add peas to reduce the amount of corn and soybean meal without affecting the normal growth performance of broilers has become a technical problem that needs to be solved urgently. Summary of the invention
[0006] The invention aims to provide a low-protein diet for broiler chickens prepared by replacing corn and soybean meal with peas and application thereof.
[0007] In order to achieve the purpose of the present invention, in a first aspect, the present invention provides a low-protein diet for broilers prepared by replacing corn and soybean meal with peas, wherein the low-protein diet is obtained by replacing a corn-soybean meal type basic diet with 10% peas, and the low-protein diet has a net energy of 2.46Mcal / kg, a crude protein of 18.5%, a standard ileum digestible lysine content of 1.20%, a standard ileum digestible methionine and cysteine content of 0.89%, a standard ileum digestible threonine content of 0.77%, a standard ileum digestible valine content of 0.90%, a standard ileum digestible isoleucine content of 0.81%, a standard ileum digestible arginine content of 1.25%, a calcium content of 0.7%, and a non-phytate phosphorus content of 0.3%; wherein the % is a mass percentage.
[0008] The formula of the corn-soybean meal type basic diet is: 47.80 parts of corn, 13.14 parts of soybean meal, 15 parts of wheat, 10 parts of peas, 4.04 parts of soybean oil, 5 parts of corn gluten meal, 1.17 parts of calcium hydrogen phosphate, 1.04 parts of stone powder, 0.3 parts of salt, 0.70 parts of 98.5% L-lysine hydrochloride, 0.38 parts of 99% DL-methionine, 0.26 parts of 98.5% L-threonine, 0.22 parts of 98% L-valine, 0.21 parts of 90% L-isoleucine, 0.33 parts of 90% L-arginine, 0.03 parts of complex vitamins, 0.20 parts of complex trace elements, 0.15 parts of choline chloride and 0.03 parts of phytase; wherein, the parts are parts by weight.
[0009] In a second aspect, the present invention provides a method for preparing a low-protein diet for broiler chickens by replacing corn and soybean meal with peas, wherein 10% peas are used to replace a corn-soybean meal type basic diet to obtain a low-protein diet, and the net energy in the low-protein diet is ensured to be 2.46Mcal / kg, the crude protein is 18.5%, the content of standard ileum digestible lysine is 1.20%, the sum of the contents of standard ileum digestible methionine and cysteine is 0.89%, the content of standard ileum digestible threonine is 0.77%, the content of standard ileum digestible valine is 0.90%, the content of standard ileum digestible isoleucine is 0.81%, the content of standard ileum digestible arginine is 1.25%, the content of calcium is 0.7%, and the content of non-phytate phosphorus is 0.3%; wherein the % is the mass percentage.
[0010] In a third aspect, the present invention provides the low-protein diet or the application of the method in broiler farming.
[0011] In a fourth aspect, the present invention provides the low-protein diet or the use of the method in improving the production performance of broilers.
[0012] In a fifth aspect, the present invention provides the low-protein diet or the use of the method in improving the feed conversion rate of broiler chickens.
[0013] Preferably, the application object is broilers in the fattening period (after 22 days of age).
[0014] By means of the above technical solution, the present invention has at least the following advantages and beneficial effects: The low-protein diet provided by the present invention mainly adopts net energy and standard ileal amino acid digestibility to prepare the diet. The present invention first determines the net energy of peas, establishes a pea net energy prediction model, and then determines the standard ileal amino acid digestibility of peas for broilers, so as to accurately measure the biological energy value of peas and various raw materials, and then adopts different peas to replace soybean meal and corn to form different replacement ratio formulas for feeding broilers, and determines the ratio of peas to replace corn and peas according to the growth performance, slaughter performance and intestinal development of broilers, so as to form a low-protein diet formula for broilers in which peas replace corn and soybean meal, so as to accurately meet the net energy and standard ileal amino acid needs of broilers, ensure intestinal health, and facilitate the realization of high slaughter performance. DETAILED DESCRIPTION
[0015] The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention. Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art, and the raw materials used are all commercially available products.
[0016] The peas used in the following examples are commercially available dry peas (usually with a dry matter content of about 88%), and the addition form is: the dry peas are crushed and added.
[0017] Example 1 A feed formula for preparing a low-protein diet for broiler chickens using peas instead of corn and soybean meal This embodiment relates to a fattening broiler diet, the specific formula of which is: 47.80 parts of corn, 13.14 parts of soybean meal, 15 parts of wheat, 10 parts of peas, 4.04 parts of soybean oil, 5 parts of corn gluten meal, 1.17 parts of calcium hydrogen phosphate, 1.04 parts of stone powder, 0.3 parts of salt, 0.70 parts of L-lysine hydrochloride (98.5%), 0.38 parts of DL-methionine (99%), 0.26 parts of L-threonine (98.5%), 0.22 parts of L-valine (98%), 0.21 parts of L-isoleucine (90%), 0.33 parts of L-arginine (90%), 0.03 parts of multivitamins, 0.20 parts of multi-trace elements, 0.15 parts of choline chloride, and 0.03 parts of phytase. Parts are parts by weight.
[0018] The compound vitamins are the same as the vitamin premixes in Table 2, and the compound trace elements are the same as the trace mineral premixes in Table 2.
[0019] 1. Establishment of the prediction equation for the net energy value of peas 1.1 Experimental animal selection and grouping The experimental period was set at 26-28 days of age. 180 healthy 22-day-old AA broilers with similar body weight (1000±30 g) were selected and randomly divided into 7 treatment groups, including 1 basic diet group and 6 test diet groups. The basic diet group had 6 replicates, and each test diet group had 5 replicates. Each replicate had 5 chickens, 2 of which were placed in a respiratory calorimeter chamber to measure respiratory heat production, and 3 were placed in a chicken house to measure metabolic energy. The experiment was completed in 3 phases, each of which lasted for 7 days, including a 3-day pre-feeding period from 22 to 24 days of age, a 1-day adaptation period in the respiratory calorimeter chamber at 25 days of age, and a 3-day main test period from 26 to 28 days of age, in which the respiratory calorimetry test and the digestion and metabolism test were carried out simultaneously.
[0020] 1.2 Experimental raw materials and feed composition Six kinds of peas were used in this experiment, namely Yunwan No. 1 (raw material 1), Yunwan No. 26 (raw material 2), Yunwan No. 88 (raw material 3), Yunwan No. 93 (raw material 4), Yunwan No. 97 (raw material 5), and Canadian peas (raw material 6). All peas were sent to Beijing Evonik Degussa for near-infrared testing of dry matter, crude protein, ADF, NDF, amino acids and other components. The total starch, amylopectin and amylose contents were tested by enzyme method using a kit in the laboratory. The nutritional components of pea raw materials are shown in Table 1.
[0021] The diets used in this experiment included a corn-soybean meal basal diet and six kinds of peas replacing 20% of the basal diet. The nutritional levels of each group met the modern broiler feeding standards. The composition and nutritional components of the basal diet are shown in Table 2. The composition and nutritional levels of the test diets are shown in Table 3.
[0022] Table 1 Nutritional composition of pea raw materials (%, dry matter basis)
[0023] Table 2 Composition and nutritional level of experimental basal diet (%, air-dried basis)
[0024] Note: Multi-dimensional and multi-mineral complexes are the same as those in Table 14.
[0025] Table 3 Composition and nutritional level of the test diets (%, air-dried basis)
[0026] 2. Test results 2.1 Effects of different diets on production performance and energy metabolism of 26-28 day old broilers The effects of different diets on nitrogen balance of 26-28 day old broilers are shown in Table 4, and the effects of different diets on energy balance, effective energy value and energy conversion efficiency of 26-28 day old broilers are shown in Table 5.
[0027] 2.2 Effective energy value and feed conversion rate of different pea raw materials The effective energy value and feed conversion rate of six different varieties of pea raw materials are shown in Table 6. The AME of the six varieties of peas were 14.84, 13.25, 14.07, 14.53, 13.23 and 14.24 MJ / kg, respectively, the AMEn were 14.63, 13.09, 14.01, 14.47, 13.13 and 14.18 MJ / kg, respectively, the NE were 10.84, 10.35, 11.11, 11.14, 9.83 and 10.13 MJ / kg, respectively, and the NE / AME were 73.05%, 78.11%, 78.96%, 76.67%, 74.30% and 71.14%, respectively.
[0028] 2.3 Pea effective energy value and net energy prediction equation The net energy prediction equation of peas for 26-28-day-old broilers constructed by stepwise regression method and the verification results are shown in Tables 7 and 8. When the AME factor is introduced, the net energy prediction equation of peas constructed is NE = -6.577 + 0.706 × apparent metabolizable energy + 2.082 × crude ash (R 2 =0.943, P <0.01). When only conventional nutrient factors are introduced, the net energy prediction equation of pea is constructed as NE=5.063+3.433×crude ash-1.073×acid detergent fiber+1.149×crude fat (R 2 =0.904, P <0.01), and the relative standard deviations between the predicted and measured values did not exceed 5%.
[0029] Table 4 Effects of different diets on nitrogen balance in broilers
[0030] Table 5 Effects of different diets on energy balance, effective energy value and energy conversion efficiency of broiler chickens Table 6 Effective energy value and energy conversion efficiency of tested peas
[0031] Table 7 Stepwise regression prediction equation for net energy of pea raw materials for broiler chickens (dry matter basis)
[0032] Table 8 Verification of the prediction equation for the net energy of pea raw materials for broiler chickens and the experimental values (MJ / kg, dry matter basis) 3. Determination of Standardized Ileal Amino Acid Digestibility of Peas in Broilers 3.1 Experimental raw materials and diet composition This experiment used five kinds of peas, namely Yunwan No. 1 (raw material 1), Yunwan No. 26 (raw material 2), Yunwan No. 93 (raw material 3), Russian pea (raw material 4), and Canadian pea (raw material 5). The nutritional components of pea raw materials are shown in Table 9.
[0033] Table 9 Common nutrient content of different varieties of pea raw materials (%, air-dried basis) 3.2 Experimental animals and experimental design This experiment adopted a single-factor experimental design. 106 healthy and uniformly weighted 25-day-old WOD188 broilers were selected and randomly divided into 6 treatment groups (6 pea treatment groups), with 6 replicates in each group and 6 chickens in each replicate. From 1d to 24d, commercial diets that met the nutritional standards for broilers were fed. From 25d to 28d, the 6 treatment groups were fed with formulated pea diets. The experimental diets were divided into the following groups: the pea raw material of experimental group A was Yunwan No. 1, the raw material of experimental group B was Yunwan No. 26, the raw material of experimental group C was Canadian peas, the raw material of experimental group D was Russian peas, the raw material of experimental group E was Yunwan No. 93 + Canadian peas (each accounting for 50%), and the raw material of experimental group F was Yunwan No. 93 + Russian peas (each accounting for 50%). By adding ingredients such as soybean oil, calcium hydrogen phosphate, vitamin premix and trace element premix, the nutritional components of the experimental diets other than protein and amino acids were ensured to be similar to those of compound feeds that met the nutritional standards for broilers (Table 10). The amino acid content of the experimental diets is shown in Table 11.
[0034] Table 10 Composition of pea experimental diet (air-dried basis)
[0035] Table 11 Amino acid content of pea diet (%, dry matter basis)
[0036] 3.3 Sample collection and processing At 28 days of age, the broilers were starved for 3 hours, fed freely for 1 hour, and then sampled 3 hours later. The chickens were stunned by electric shock and bled to death by neck. The abdominal cavity was opened to separate the ileum, and the ileum was folded in half to take the back half (remove the end 2 cm), and the ileum chyme was flushed into a culture dish with distilled water (each duplicate chyme was collected in the same culture dish). The chyme was frozen and freeze-dried, crushed and passed through a 40-mesh sieve, and then bagged and placed in a -20℃ refrigerator for amino acid determination.
[0037] 4. Results and Analysis The apparent ileal amino acid digestibility of peas for 28-day broilers is shown in Table 12. The apparent ileal amino acid digestibility of different peas for 28-day broilers is as follows: aspartic acid (87.70±2.77%); threonine (81.54±3.12%); serine (85.42±3.09%); glutamic acid (90.04±2.59%); proline (82.97±4.18%); glycine (84.35±3.37%); alanine (84.60±2.91%); cystine (73.22± 4.45%;valine(83.20±3.43%);methionine(86.28±4.01%);isoleucine(84.93±3.42%);leucine(85.55±3.07%);tyrosine(86.67±2.49%);phenylalanine(87.59±3.12%);histidine(88.44±2.92%);lysine(91.01±2.51%);arginine(92.32±2.33%);tryptophan(78.09±5.40%)。 Among the apparent ileal amino acid digestibility of 18 kinds of amino acids in 28d broilers, the average AID of arginine was the highest, which was 92.32%, and the average AID of cystine was the lowest, which was 73.22%.
[0038] Based on the data of apparent ileal amino acid digestibility and endogenous amino acid loss, the standard ileal amino acid digestibility was calculated as shown in Table 13. The standard ileal amino acid digestibility ranges of 28-day broilers for different peas were as follows: aspartic acid (90.87±2.83%); threonine (89.51±3.26%); serine (89.29±3.17%); glutamic acid (93.87±2.65%); proline (88.30±4.33%); glycine (88.89±3.49%); alanine (87.72±2.97%); cystine (76.71±4.4 4%;valine (87.53±3.51%);methionine (89.86±4.17%);isoleucine (88.31±3.47%);leucine (89.29±3.17%);tyrosine (91.63±2.69%);phenylalanine (91.25±3.25%);histidine (91.64±2.97%);lysine (93.62±2.58%);arginine (94.03±2.28%). Among the 17 kinds of amino acids in the 28-day broiler chickens, the average SID value of arginine was the highest, which was 94.03%, and the average SID value of cystine was the lowest, which was 76.71%.
[0039] Table 12 Apparent ileal amino acid digestibility of peas in 26-28 day old broilers (%) 1
[0040] Note: 1 The values are the average of 6 repeated measurements. Data in the same column with different lowercase letters indicate significant differences ( P <0.05, no letters or the same lowercase letters indicate no significant difference ( P >0.05).
[0041] Table 13 Standard ileal amino acid digestibility of peas in 26-28 day old broilers (%) 1 5. Experiment on using peas to replace corn and soybean meal in low-protein diets for broiler chickens 5.1 Experimental animals and experimental design The experiment selected 1500 healthy 1-day-old ROSS 308 male chicks, which were fed with the same feed before 21 days of age. At 22 days of age, 900 chickens were randomly divided into 15 treatment groups based on the consistency of the initial body weight of the experiment, with 6 replicates in each group and 10 chickens in each replicate. According to the two-factor experimental design, the diets prepared with different pea addition levels (0, 10%, 20%) and 5 different amino acid levels (1.00%, 1.10%, 1.20%, 1.30% and 1.40% based on standard ileal digestible lysine) were fed respectively, and the nutritional level met the modern broiler feeding standards (Table 14).
[0042] Table 14 Diet formula and nutrient level of broiler chickens aged 22 to 42 days (air-dried basis) Note: 1 Vitamin premix (per kg diet) provides: Vitamin A, 15,000 IU; Vitamin D3, 3,600 IU; Vitamin E, 30 IU; Vitamin K3, 3 mg; Vitamin B1, 1.60 mg; Vitamin B2, 9.6 mg; Vitamin B6, 3.6 mg; Vitamin B12, 0.03 mg; D -Biotin, 0.15 mg; D -Pantothenic acid, 13.8 mg; Folic acid, 1.5 mg; Niacinamide, 45 mg.
[0043] 2 Trace mineral premix (per kg diet) provided: Fe, 80 mg; Cu, 16 mg; Mn, 120 mg; Zn, 110 mg; Se, 0.30 mg; I, 1.5 mg; Co, 0.5 mg.
[0044] 5.2 Test results The results of broiler growth performance measured at 42 days of age (Table 15) showed that the standard ileal digestible lysine level in the diet had a very significant effect on the body weight, body weight gain, feed intake, and feed-to-weight ratio of broilers at the end of the experiment (P<0.001). The standard ileal digestible lysine in the diet exceeded 1.20%, which led to a significant decrease in the body weight and body weight gain of broilers at the end of the experiment, and an increase in the feed-to-weight ratio. This shows that the appropriate level of standard ileal digestible lysine in the broiler diet during the fattening period is 1.20%. At the same time, the level of pea addition in the diet also had a significant effect on the feed-to-weight ratio of broilers (P<0.001). Adding 10% peas did not affect the feed-to-weight ratio of broilers, but adding 20% peas significantly reduced the feed-to-weight ratio. In addition, there was an interactive trend between the pea addition level and standard ileal digestible lysine on the weight gain and feed intake of broilers (P<0.10). When the standard ileal digestible lysine in the diet is 1.20% and the pea addition level is 10%, the broiler body weight gain reaches the maximum, the feed intake is appropriate, and the final feed-to-weight ratio is 1.65, achieving a relatively good effect.
[0045] The results of broiler slaughter performance (Table 16) showed that there was a significant interaction between the standard ileal digestible lysine level in the diet and the broiler slaughter rate (P<0.05). When the standard ileal digestible lysine was 1.20% and the pea addition level was 10%, the broiler slaughter rate, breast muscle rate, and leg muscle rate reached the ideal value, with no significant difference from the maximum value.
[0046] The digestive organ index is an indicator of the physical properties of feed and the ease of digestion. The results of broiler organ index measurement (Table 17) showed that the standard ileal digestible lysine level and the pea addition ratio affected the duodenum (P<0.05) and jejunum index (P<0.10). When the standard ileal digestible lysine was 1.20% and the pea addition was 10%, the small intestine development was within the normal range. When the pea addition was 20%, the development of the duodenum and jejunum was inhibited, which may also be the factor causing the decline in broiler production performance after adding 20% peas.
[0047] Table 15 Effects of different SIDLys levels and pea addition ratios on production performance of broilers aged 22 to 42 days Table 16 Effects of different SIDLys levels and pea addition ratios on slaughter performance of 42-day-old broilers Table 17 Effects of different SIDLys levels and pea addition ratios on organ indexes of 42-day-old broilers From the above test results, it can be seen that when the pea addition level is 10%, the net energy of the diet is 2.46Mcal / kg, the crude protein is 18.5%, the content of standard ileum digestible lysine is 1.20%, the content of standard ileum digestible methionine and cystine is 0.89%, the content of standard ileum digestible threonine is 0.77%, the content of standard ileum digestible valine is 0.90%, the content of standard ileum digestible isoleucine is 0.81%, the content of standard ileum digestible arginine is 1.25%, the content of calcium is 0.7%, and the content of non-phytate phosphorus is 0.3%. The broiler body weight gain reaches the maximum, the feed intake is appropriate, and the final feed-to-weight ratio is 1.65, achieving a relatively good effect. The slaughter rate, breast muscle rate, and leg muscle rate of broilers reach the ideal value, with no significant difference from the maximum value, and the small intestine develops normally.
[0048] Although the present invention has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made based on the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection claimed by the present invention.
Claims
1. A low-protein diet for broiler chickens prepared by using peas instead of corn and soybean meal, characterized in that: The low-protein diet is obtained by replacing a corn-soybean meal-based basic diet with 10% peas, and the low-protein diet has a net energy of 2.46 Mcal / kg, a crude protein of 18.5%, a standard ileum digestible lysine content of 1.20%, a standard ileum digestible methionine and cystine content of 0.89%, a standard ileum digestible threonine content of 0.77%, a standard ileum digestible valine content of 0.90%, a standard ileum digestible isoleucine content of 0.81%, a standard ileum digestible arginine content of 1.25%, a calcium content of 0.7%, and a non-phytate phosphorus content of 0.3%; Wherein, the % is the mass percentage.
2. The low-protein diet according to claim 2, characterized in that The formula of the corn-soybean meal basic diet is: 47.80 parts of corn, 13.14 parts of soybean meal, 15 parts of wheat, 10 parts of peas, 4.04 parts of soybean oil, 5 parts of corn gluten meal, 1.17 parts of calcium hydrogen phosphate, 1.04 parts of stone powder, 0.3 parts of salt, 0.70 parts of 98.5% L-lysine hydrochloride, 0.38 parts of 99% DL-methionine, 0.26 parts of 98.5% L-threonine, 0.22 parts of 98% L-valine, 0.21 parts of 90% L-isoleucine, 0.33 parts of 90% L-arginine, 0.03 parts of multivitamins, 0.20 parts of multi-trace elements, 0.15 parts of choline chloride, and 0.03 parts of phytase; Wherein, the parts are parts by weight.
3. A method for preparing a low-protein diet for broiler chickens by using peas instead of corn and soybean meal, characterized in that: A low-protein diet is obtained by replacing a corn-soybean meal-based basic diet with 10% peas, and the net energy in the low-protein diet is ensured to be 2.46Mcal / kg, the crude protein is 18.5%, the content of standard ileum digestible lysine is 1.20%, the sum of the contents of standard ileum digestible methionine and cystine is 0.89%, the content of standard ileum digestible threonine is 0.77%, the content of standard ileum digestible valine is 0.90%, the content of standard ileum digestible isoleucine is 0.81%, the content of standard ileum digestible arginine is 1.25%, the content of calcium is 0.7%, and the content of non-phytate phosphorus is 0.3%; Wherein, the % is the mass percentage.
4. The method according to claim 3, characterized in that The formula of the corn-soybean meal type basic diet is the same as that described in claim 2.
5. Use of the low-protein diet according to claim 1 or 2, or the method according to claim 3 or 4 in broiler farming.
6. Use of the low-protein diet according to claim 1 or 2, or the method according to claim 3 or 4 in improving the production performance of broilers.
7. Use of the low-protein diet according to claim 1 or 2, or the method according to claim 3 or 4 in improving the feed conversion rate of broiler chickens.
8. The use according to any one of claims 5 to 7, characterized in that: The application object is broiler chickens in the fattening period.
9. The use according to any one of claims 5 to 7, characterized in that: The target of application is broilers over 22 days old.