Fertilizing method of enhancing wheat nitrogen use efficiency and lodging resistance

A technology of wheat nitrogen and fertilization methods, which is applied in the field of plant growth and nutritional status monitoring, can solve the problems of increasing the incidence of diseases and insect pests, only 33%, and loss, so as to improve the ability to resist low temperature stress in winter, promote deep root growth, and reduce inhibition. The effect of action

Inactive Publication Date: 2013-05-22
CROP RES INST SHANDONG ACAD OF AGRI SCI
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The world consumes 87,000,000 tons of N fertilizer every year, 60% of which is used for the production of cereal crops. However, the nitrogen use efficiency of cereal crops is only 33% (Alexandratos, 1995)
The problem of reduced N fertilizer utilization rate and serious loss caused by excessive application of N fertilizer has become increasingly prominent, and the more serious problem is that a large amount of NO3- accumulated in the soil pollutes groundwater (Ju Xiaotang, 2003); on the other hand, in In a high N growth environment, free N in wheat leaves increases accordingly, and the convers

Method used

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  • Fertilizing method of enhancing wheat nitrogen use efficiency and lodging resistance
  • Fertilizing method of enhancing wheat nitrogen use efficiency and lodging resistance

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Example 1 This experiment was carried out at the experimental site of the Crop Research Institute of the Shandong Academy of Agricultural Sciences, where the soil fertility was moderate; the farming method was conservation tillage (after harvesting the corn crop of the previous season, the stalks were directly crushed and returned to the field, and the wheat was sown with a no-till machine). The variety is Jimai 22.

[0029] a. Base fertilizer: apply compound fertilizer before wheat sowing, N, P 2 o 5 、K 2 The amount of O was 5, 7, 7kg / mu respectively. Plow immediately after fertilization, mix the fertilizer with the soil, and avoid the volatilization of nutrients due to exposure.

[0030] b. The sowing rate of wheat is 9kg / mu, and the row spacing is 20cm.

[0031] c. The NDVI value of wheat is 0.27, and the population is 453,000 tillers / mu.

[0032] d. In the early stage of jointing of wheat (1 node), the NDVI value measured by GreenSeeker is 0.59.

[0033] e. Us...

Embodiment 2

[0039] Example 2 This experiment was carried out at the Changqing Fine Seed Factory in Shandong Province. After harvesting the last crop corn, the stalks were directly crushed and returned to the field, and the soil was plowed deeply; the wheat variety was Jimai 22.

[0040] a. Base fertilizer: apply compound fertilizer before wheat sowing, N, P 2 o 5 、K 2 The amount of O was 5, 6.5, 7kg respectively. Plow immediately after fertilization, mix the fertilizer with the soil, and avoid the volatilization of nutrients due to exposure.

[0041] b. The sowing rate of wheat is 10kg / mu, and the row spacing is 22cm.

[0042] c. Wheat grows to the early stage of rising, the population is 427,000 tillers / mu, and the NDVI value is 0.28.

[0043] d. In the early stage of wheat jointing (1 node), the NDVI value was determined by GreenSeeker to be 0.49, and N, P, and K compound fertilizers were used as the base material, and potassium chloride and urea were used to adjust the nutrient con...

Embodiment 3

[0049] Example 3 This experiment was carried out on farmland in Zhangqiu City, Shandong Province (low soil fertility), the soil was rotary tilled, and no straw was returned to the field; the wheat variety was Yannong 19.

[0050] a. Base fertilizer: apply compound fertilizer before wheat sowing, N, P 2 o 5 、K 2 O consumption is 6,7,6kg respectively. Plow immediately after fertilization, mix the fertilizer with the soil, and avoid the volatilization of nutrients due to exposure.

[0051] b. The sowing rate of wheat is 12kg / mu, and the row spacing is 20cm.

[0052] c. Wheat grows to the early stage of rising, the population is 316,000 tillers / mu, and the NDVI value is 0.19.

[0053] d. Therefore, N, P, and K compound fertilizers are used as base materials during the rising period, and potassium sulfate and urea are used to adjust the nutritional content, and N, P are applied per mu. 2 o 5 、K 2 O was 11, 4, and 9 kg respectively (5 cm into the soil in the ditch), and then ...

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Abstract

The invention discloses a fertilizing method of enhancing wheat nitrogen use efficiency and lodging resistance. The fertilizing method of enhancing the wheat nitrogen use efficiency and the lodging resistance comprises the following steps: 1, fertilizing with nitrogen, phosphorus and potassium compound fertilizer before seeding; 2, determining normalized difference vegetation index (NDVI) value in an arising period and a jointing stage, conducting variable rate fertilization according to magnitude of the NDVI value, and improving potassium element application rate; 3, in the middle and later periods of wheat grouting, spraying KH2PO4 on leaves. By improving base fertilizer and fertilizing strategy (reducing base fertilizer application rate, especially reducing nitrogen element application; converting traditional phosphorus and potassium basal application to basal and fertilizing application ), the fertilizing method of enhancing the wheat nitrogen use efficiency and the lodging resistance utilizes K+ free of volatility and relative low in drip washing performance to promote absorption of the wheat on soil NO3- strong in leachability, and improves utilization efficiency of the wheat nitrogen element. Meanwhile, by improving the potassium element application rate, the fertilizing method of enhancing the wheat nitrogen use efficiency and the lodging resistance promotes mechanical strength of a stalk, and strengthens the wheat lodging resistant performance.

Description

technical field [0001] The invention belongs to the technical field of plant growth and nutritional status monitoring, and particularly relates to a fertilization method that uses a normalized difference vegetation index (NDVI) to guide nitrogen application during the growth and development of wheat to improve nitrogen use efficiency and lodging resistance. Background technique [0002] The jointing stage of wheat is the key period for the development of wheat stalk and its mechanical strength. The organic matter stored in the stalk in the late growth period decomposes in large quantities, which is also an important factor that changes the mechanical strength of the stalk. If the mechanical strength of the stalk is weak, the lodging resistance of the plant is low, and the final wheat yield is severely impaired. According to research, lodging can reduce wheat grain yield by more than 30% (Vera et al., 2012; Wiersma et al., 2011). Although wheat scientists have done a lot of...

Claims

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Application Information

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IPC IPC(8): A01G1/00A01C21/00
Inventor 孔令安王法宏司纪升冯波孙铭泽张宾李升东王峥李华伟
Owner CROP RES INST SHANDONG ACAD OF AGRI SCI
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