Soil nitrogen regulation method after straw turnover

A compound bacterial agent, Aspergillus oryzae technology, applied in soil conditioning materials, microorganism-based methods, chemical instruments and methods, etc., can solve problems such as unsatisfactory effects, differences in decomposition speed and decomposition efficiency, etc.

Pending Publication Date: 2017-12-01
INST OF AGRI RESOURCES & ENVIRONMENT NINGXIA ACAD OF AGRI & FORESTRY SCI NINGXIA KEY LAB OF SOIL & PLANT NUTRITION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the decomposition speed and decomposition efficiency of different bacterial agents are very different. Althou

Method used

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  • Soil nitrogen regulation method after straw turnover
  • Soil nitrogen regulation method after straw turnover
  • Soil nitrogen regulation method after straw turnover

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The optimization and detection of embodiment 1 compound bacterial agent

[0041] 1.1 Preparation of compound bacterial agent

[0042] Types of bacteria

The proportion of bacteria (mass ratio)

Trichoderma Reesei

10-20％

Aspergillus oryzae

3-15％

Trichoderma

5-20％

White rot fungus (Phanerochaete Chrysosprium)

10-20％

Bacillus subtilis

15-20％

Clostridium cellulovorans

10-20％

Sporocytophaga

3-10％

Streptomyces

10-20％

Acetobacter

5-15％

photosynthetic bacteria

5-15％

Paenibacillus polymyxa

5-10％

Rhizobium meliloti (Sinorhizobium meliloti)

5-10％

[0043] The total effective number of viable bacteria of the above-mentioned composite bacterial agents is 1-2×10 8 individual / mL.

[0044] The above-mentioned composite microbial agent contains bacteria, fungi and actinomycetes, which overcomes the problem of limited ability of a single microorganism t...

Embodiment 3

[0051] Example 3 Effect of Straw Returning on Soil Fertility Using Composite Bacteria Agent

[0052] In 2014, my country's corn planting area has reached 3.5 million hectares. The impact of repeated cropping of corn on yield is small, and repeated cropping is common. Therefore, the corn system is taken as the research object to determine the impact of compound bacterial agents on soil fertility after corn stalks are returned to the field, and the impact on corn stalks. The effect of fertilization after planting.

[0053] 3.1 Test grouping

[0054] There were 5 treatments in the field experiment, and each treatment was repeated 3 times. The way of straw returning to the field is straw crushing and returning to the field. The traditional fertilization without straw returning was set as the control group (CK group), and the other 4 groups included: simple corn straw returning group + traditional fertilization group (group A), traditional fertilization group + corn compound bacte...

Embodiment 4

[0067] Example 4 Effect of Straw Returning on Crop Yield Using Composite Bacteria

[0068] Corn stalks were planted experimentally in field plots. The control group was corn stalks not returned to the field and chemical fertilizers were applied. Experimental group 1 was corn stalks returned to the field with chemical fertilizers. For corn stalks returning to the field and compound bacterial agent, 30% reduced chemical fertilizers were applied, and each group had 3 replicates. Each group of corn was harvested individually, and the actual yield was measured.

[0069] The results showed that compared with the control group without returning straw to the field, the corn yield of the corn straw returning combined with chemical fertilizer treatment group increased by nearly 4%, and the corn yield of the corn straw returning plus compound bacterial agent combined with chemical fertilizer group increased by nearly 22% , corn stalks returned to the field and compound bacterial agent c...

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Abstract

The invention relates to a soil nitrogen regulation method after straw turnover. According to the method, chemical fertilizers and compound fungal and bacterial fertilizers are applied after straw turnover, nitrogen content of soil is improved, by proceeding from reduction of crop planting cost and factors such as environments, yield is ensured, and usage of the chemical fertilizers is decreased. In order to achieve the purpose, the compound fungal and bacterial fertilizers comprise bacteria, fungi and ray fungi, the problem of limited decomposition capacity of a single microorganism for macromolecular substances with complicated structures such as cellulose, hemicellulose and lignin in straws is solved, and mixed bacteria cooperate with each other, depend on each other and have better activity and decomposition effects as compared with a single bacterium. An optimization scheme is provided for existing straw turnover, and the regulation method has an excellent reference value for popularization and application of straw turnover.

Description

technical field [0001] The invention relates to the technical field of soil improvement, in particular to a method for regulating soil nitrogen in straw returning to the field. Background technique [0002] my country has abundant straw resources, and returning straw to the field is an important agricultural management measure that can increase the content of soil organic matter, and the increase in the level of soil organic matter is not only an important indicator of soil fertility, but also an important indicator of global warming. , one of the goals pursued by how to use soil carbon sequestration to mitigate the greenhouse effect. [0003] However, the carbon-nitrogen ratio of straw is relatively high, and competition for nitrogen with soil microorganisms in the short-term decomposition process will affect the crop availability of soil nitrogen and fertilizer nitrogen, and further affect the early growth of crops. The rate of application has an extremely important effect...

Claims

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Application Information

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IPC IPC(8): C12N1/20C12N1/14C09K17/14C05G1/00C05F15/00A01D82/00C12R1/885C12R1/69C12R1/645C12R1/125C12R1/145C12R1/01C12R1/465C12R1/02C12R1/12C12R1/41C09K101/00
CPCA01D82/00C05B7/00C05F11/00C09K17/14C09K2101/00C12N1/14C12N1/20C05C9/00C05D1/02C05F11/08
Inventor 张学军刘晓彤罗健航赵营张丽柯英周丽娜冒辛平
Owner INST OF AGRI RESOURCES & ENVIRONMENT NINGXIA ACAD OF AGRI & FORESTRY SCI NINGXIA KEY LAB OF SOIL & PLANT NUTRITION
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