CN-121986640-A - Application method and application of liquid manure in corn planting

Abstract

The invention provides an application method and application of liquid manure in corn planting, and relates to the technical field of crop planting. The application method comprises the steps of applying liquid manure as base fertilizer into soil in a spray irrigation mode before corn soil preparation, and respectively utilizing the liquid manure to carry out first topdressing and second topdressing in a drip irrigation mode after a jointing period and an initial grouting period, wherein the topdressing time point is set according to nutrient requirements of different growth stages of corn, so that the stepwise matching of nutrient supply of the liquid manure and a crop fertilizer requirement rule is realized. The field test shows that the corn yield can reach 14.55 t/hm 2 by adopting the method, the yield is increased by 12.08% compared with the conventional fertilization, the economic benefit can be obviously improved, and the quick-acting soil nutrient and organic matter content can be improved. The invention provides a feasible technical path for recycling the livestock and poultry manure and replacing the fertilizer decrement.

Inventors

• LIU LONG
• ZHANG JINGJIE
• Meng Denghui
• YAN BINGJIAN
• Dang tengfei
• ZHANG HUAIQI
• Zheng Wenshuang
• ZHOU CHENHUI
• HU XIAOSHAN
• TONG JIAFENG

Assignees

• 牧原食品股份有限公司
• 河南牧原生态环境科技有限公司

Dates

Publication Date

20260508

Application Date

20260319

Claims (9)

1. 1. A method of applying liquid manure to corn planting, comprising the steps of: before corn soil preparation, applying liquid manure as base fertilizer into soil in a spray irrigation mode; after the corn jointing period, the liquid manure is utilized to carry out the first topdressing in a drip irrigation mode; In the early stage of corn grouting, liquid manure is utilized to carry out secondary topdressing in a drip irrigation mode; The time points of the first topdressing and the second topdressing are set according to the nutrient requirements of different growth stages of the corn, so that the stepwise matching of the nutrient supply of the liquid manure and the fertilizer requirement rule of the corn is realized.
2. 2. The method of claim 1, wherein the liquid manure is a liquid residue obtained by solid-liquid separation and anaerobic fermentation of pig manure.
3. 3. The method of claim 2, wherein the liquid manure has a total nitrogen concentration of 0.6-1.5 kg/m 3 , a total phosphorus concentration of 0.06-0.15 kg/m 3 , and a potassium ion concentration of 0.5-1.1 kg/m 3 .
4. 4. The application method according to claim 1, wherein rotary tillage is performed during soil preparation, the depth is 15-25 cm, and ridge planting is performed, and the ridge distance is 55-65 cm.
5. 5. The application method according to claim 1, wherein the corn sowing time is 4 months middle and late to 5 months upper ten days, the planting density is 4000-5000 plants/667 m 2 , and the sowing depth is 3-5 cm.
6. 6. The application method according to claim 1, wherein the liquid manure is applied as a base fertilizer to the soil in an amount of 10 to 20 m 3 /667m 2 .
7. 7. The application method according to claim 1, wherein the liquid manure application amount of the first additional fertilizer is 15-20 m 3 /667m 2 ; The application amount of the liquid manure for the second additional fertilizer is 10-15 m 3 /667m 2 .
8. 8. The method of claim 7, wherein the cumulative liquid manure application amount of the first and second topdressing is 15-30m 3 /667m 2 .
9. 9. The application method according to any one of claims 1 to 8 for high-yield planting under the condition of achieving corn fertilizer reduction or zero fertilizer input.

Description

Application method and application of liquid manure in corn planting Technical Field The invention relates to the technical field of crop planting, in particular to an application method and application of liquid manure in corn planting. Background Corn is one of crop varieties with the largest planting area in China, plays an important role in grain production, and has great significance in guaranteeing grain safety. However, under the dual pressures of continuous increase of grain demand and shortage of resources in China, the main way to increase the total yield of grains is to increase the yield per unit area. Corn is a dual-purpose crop for both food and feed, and is an important way for many farmers to increase income. However, the corn yield per unit level in China is still not high, development of sustainable high-yield planting technology is needed, basic research of corn yield is enhanced, high-yield theory is enriched, and a high-yield forming mechanism is revealed to guide production practice, so that sufficient grains can be produced under the condition of limited resources. Nitrogen nutrition is a key factor affecting crop yield, corn is a crop requiring more nitrogen, and each 100 kg kernels produced absorbs about 2.68: 2.68 kg nitrogen. Although the industrialized nitrogenous fertilizer production relieves the problem of insufficient nitrogen supply of soil, the dosage of the nitrogenous fertilizer in the agricultural production is continuously increased and the application is unreasonable, so that the fertilizer utilization rate is low, the agricultural economic benefit is reduced, and the problem of environmental pollution is caused. Therefore, scientific and reasonable use of nitrogen fertilizer has become an important measure for improving agricultural economy and ecological benefits. Meanwhile, with the increasing severity of environmental protection, the environmental management requirements of the livestock and poultry raising industry are continuously improved. The recycling of the livestock and poultry manure is one of the main ways for reducing the agricultural non-point source pollution. By changing livestock and poultry manure into valuables, the use of chemical fertilizers and pesticides can be reduced, and the crop yield can be improved. Therefore, the implementation of the breeding circulation mode promotes the recycling of the livestock and poultry manure, and becomes the trend of the future agricultural development. The liquid manure is a fertilizer applied in liquid state after livestock and poultry manure is decomposed by proper physical, chemical, biological and other harmless treatments. The fertilizer not only contains a large amount of nutrient elements such as nitrogen, phosphorus, potassium and the like, but also is rich in humic acid, organic matters, amino acids, growth hormone and various trace elements, can provide comprehensive nutrition and moisture for crops, and simultaneously reduces the requirement of irrigation water. The liquid manure is used for crop growth, not only can meet nutrient supply, but also is beneficial to ecological environment protection. In the prior art CN115380777A, the problems of low fertilizer utilization rate and environmental pollution in the corn yield increasing process are solved through the synergistic effect of seed coating agent and nutrient soil and the combination of staged topdressing, and the yield improvement and the quality improvement are realized, but it is not clear how the fertilizer water generated after the livestock and poultry manure is treated is applied to the high-yield corn planting. The prior art CN118691020A provides a calculation method of the magnitude of livestock and poultry manure applied to the field as fertilizer water, but does not describe the concrete application magnitude and application method of the fertilizer water in the growth and development period of crops. Therefore, the research and development of the corn planting method using the liquid manure as the fertilizer can realize the resource utilization of wastes, reduce the environmental pollution, simultaneously, the nutrient components contained in the liquid manure can be directly absorbed and utilized by crops and corns, and the growth and development are promoted, so that the method becomes necessary and urgent. In view of this, the present invention has been made. Disclosure of Invention The relevant terms referred to in the present invention are explained as follows: 1. The liquid manure is a fertilizer which is used as liquid applied after livestock and poultry manure is decomposed by proper physical, chemical, biological and other harmless treatments, and contains various amino acids, vitamins, proteins, auxins, saccharides, nucleic acids, antibiotics and the like. The liquid manure is especially fertilizer water obtained by solid-liquid separation, anaerobic fermentation and other harmless treatments of manure produced in pig farm