10 results about "Soil nitrate" patented technology

The present application relates to the field of agricultural environmental protection method, particularly to a method for reducing the pollution of vegetable field soil non-point source and N2O.The method provided by the present application fully considers the carbon and nitrogen content, C / N and cellulose content of different exogenous carbon materials, reduces the application of chemical fertilizer nitrogen under the premise of ensuring the nitrogen supply of vegetables according to the nitrate nitrogen content of vegetable field soil, increases the amount of effective state carbon and the content of holocellulose by optimizing the combination and proportion of different exogenous carbon materials, improves the nitrate nitrogen assimilation of vegetable field soil, reduces the nitrogen leaching and soil N2O emission, and realizes the coordinated reduction and regulation of the pollution of vegetable field soil non-point source and N2O.The method is clear, simple, convenient, easy to implement.

The invention relates to the technical field of agricultural resources and environment, in particular to a fertilization method for reducing nitrogen loss of an apple orchard. The apple branch biochar is prepared from the apple orchard pruning waste, and resource utilization of the waste is achieved. Through the synergistic effect of the apple branch charcoal, dicyandiamide and the reduced nitrogen fertilizer, the loss of nitrate nitrogen in soil is obviously slowed down, the conversion of ammonium nitrogen is inhibited, and a nitrogen cycle functional microflora is regulated, so that the application amount of the nitrogen fertilizer is reduced, the utilization rate of the nitrogen fertilizer is improved, and the environmental pollution is reduced; the growth of apple plants can be obviously promoted, the root configuration is improved, and the root activity and the nitrate reductase activity are improved.

The invention relates to the technical field of chemical component detection, and particularly discloses fluorescent test paper, a fluorescence analysis method and a fluorescence analysis device for visual online detection of soil nitrate nitrogen. According to the test paper, nitrate nitrogen is reduced into nitrite nitrogen by adopting zinc powder and a cadmium chloride solution, and then the nitrite nitrogen is dropwise added to fluorescent test paper prepared by soaking a mixed solution of para aminobenzoic acid, N-phenyl-1-naphthylamine and hydrochloric acid; under an acidic condition, nitrite nitrogen and para aminobenzoic acid generate diazonium salt, and then the diazonium salt reacts with N-phenyl-1-naphthylamine to form an azo compound, so that the original blue fluorescence on the test paper is gradually weakened along with the increase of the concentration of the nitrate nitrogen. According to the method, high-sensitivity and specific recognition of nitrate nitrogen is realized. And in combination with color identification and data analysis software of a smart phone, a portable and low-cost field detection system is constructed, and an efficient and practical new technical means is provided for visual quantitative detection of soil nitrate nitrogen.

This invention discloses a nitrogen-potassium synergistic fertilization method suitable for alfalfa cultivation in saline-alkali land, belonging to the field of agricultural fertilization technology. Addressing the problem that existing technologies lack specific alfalfa fertilization methods for saline-alkali land and fail to stimulate nitrogen fixation by rhizobia through nutrient synergy, resulting in high nitrogen fertilizer dependence and low utilization, the invention includes: measuring the rhizosphere soil electrical conductivity before sowing or before the greening stage to classify the degree of saline-alkali stress, and measuring the nitrate nitrogen content; dynamically adjusting the mass ratio of nitrogen to potassium oxide in the fertilizer based on the nitrate nitrogen content and salinity level; selecting a baseline ratio based on the salinity level when soil nitrate nitrogen is low, halving nitrogen application when moderate, and stopping nitrogen fertilizer application when sufficient; applying exogenous nitrogen fertilizer twice during the greening to initial flowering stage, and applying potassium fertilizer containing potassium humate once during the greening to branching stage, with the potassium humate supplying no less than 30% of the total potassium. This method is mainly used for alfalfa cultivation in saline-alkali land, achieving efficient synergistic utilization of nitrogen and potassium and alleviating saline-alkali stress.

The application discloses a nitrogen-potassium synergistic fertilization method suitable for alfalfa planting in saline-alkali soil and belongs to the technical field of agricultural fertilization. In view of the fact that alfalfa fertilization methods for saline-alkali soil are lacked in the prior art, the nodule bacteria nitrogen fixation cannot be excited by nutrient synergy, nitrogen fertilizer is highly dependent, and the utilization rate is low, the application scheme comprises the following steps: determining the rhizosphere soil conductivity before sowing or before the green stage to divide the saline-alkali stress degree, and determining the nitrate nitrogen content; according to the mass ratio of nitrogen to potassium oxide in the fertilizer is dynamically adjusted according to the nitrate nitrogen content and the saline-alkali degree, when the soil nitrate nitrogen is low, the standard ratio is selected according to the saline-alkali degree, when it is moderate, the nitrogen is halved, and when it is sufficient, the nitrogen fertilizer is stopped; the exogenous nitrogen fertilizer is applied twice from the green stage to the initial flowering stage, the potassium fertilizer containing potassium fulvate is once deep applied from the green stage to the branching stage, and the potassium supply amount of the potassium fulvate is not less than 30% of the total potassium amount. The method is mainly used for alfalfa planting in saline-alkali soil, realizes nitrogen-potassium synergistic high-efficiency utilization, and relieves the saline-alkali stress.

The invention provides an inhibitor-containing water-soluble fertilizer special for greenhouse tomatoes as well as a preparation method and application of the inhibitor-containing water-soluble fertilizer, and belongs to the technical field of fertilizers. The special water-soluble fertilizer for greenhouse tomatoes comprises urea, monoammonium phosphate, potassium nitrate, boric acid, zinc sulfate, mineral source potassium fulvate, a growth regulator, amino acid, a nitrification inhibitor and a stable synergist. The invention further provides a preparation method and application of the special water-soluble fertilizer for the greenhouse tomatoes, and the special water-soluble fertilizer for the greenhouse tomatoes can promote root systems of the greenhouse tomatoes to grow downwards and enhance the photosynthesis capacity of leaves, so that the yield and quality of the tomatoes are improved; meanwhile, leaching loss of nitrate nitrogen in greenhouse tomato soil is reduced, and emission of greenhouse gas N2O and volatilization of NH3 are reduced.

A real-time monitoring system for in situ soil nitrate concentration measurement comprising at least one 3D-printed and chemically functionalized potentiometric soil sensor for measuring nitrate levels and methods of making the real-time monitoring system. The real-time monitoring system is capable of providing multi-depth nitrate concentration measurements and continuous measurements over time.

The invention relates to the technical field of geological monitoring, in particular to a microorganism prediction method for monitoring, preventing and treating karst rocky desertification. Comprising the following steps: S1, respectively collecting land soil samples in a karst region and a non-karst region, and determining soil physicochemical properties including soil pH, soil total nitrogen, soil nitrate nitrogen, soil available phosphorus, soil total potassium, soil available potassium, soil exchangeable calcium, soil exchangeable sodium, soil chloride ion content and soil organic carbon; s2, the stony desertification succession process is analyzed through the vegetation coverage degree of the karst region, the correlation between the stony desertification succession process and the soil physicochemical properties is calculated, and the difference statistics of the soil physicochemical properties is obtained according to the correlation; s3, respectively extracting total DNA of the soil samples in each region, and analyzing to obtain composition characteristics of florae in the soil samples; s4, quantifying flora richness change through a specific measurement algorithm, and evaluating the stability of the microflora by adopting a parameter dispersion method; s5, taking bacteria and fungal species in the rocky desertification succession soil microbiome in the karst region and relative abundance in each corresponding sample as data, establishing an attribute feature set, and determining new biological indicator information based on an attribute data set; and S6, establishing a microorganism prediction model of karst rocky desertification monitoring control work.

The invention discloses an appropriate depth research method for complete profile distribution characteristics of nitrate nitrogen in loess plateau rain-fed apple orchard soil. The method comprises the following steps: (1) collecting literature data; (2) field acquisition of a soil profile; and (3) nitrate nitrogen indoor determination. In the east, south, west, north and middle areas of a loess plateau apple main producing area, through literature data arrangement, field soil sample collection and indoor analysis, the distribution characteristics of the nitrate nitrogen 6-m section of the soil of the apple orchard are disclosed, and whether the 6-m section is applicable or not is explored and the distribution characteristics of the nitrate nitrogen section of the soil of the loess plateau rain-fed apple orchard are completely disclosed.

The present application belongs to the field of agricultural production and environmental protection, and specifically relates to a root zone soil water and nitrogen growth and decline type drip irrigation method and a drip irrigation device. In the drip irrigation process, the water input amount of the left root zone soil of crops relative to the right root zone soil is reduced, and the nitrogen nutrient input amount of the left root zone soil of crops relative to the right root zone soil is increased, so that the water and nitrogen of the two sides of the root zone soil are input in a growth and decline type, the distribution of the water and nitrate nitrogen of the root zone soil on the two sides is regulated in a growth and decline type, and the leaching of soil nitrate nitrogen is reduced without negatively affecting the yield of crops.