Fertilizing method in relay intercropping planting of potatoes and soybeans

Abstract

The invention discloses a fertilizing method in relay intercropping planting of potatoes and soybeans. The fertilizing method is based on a principle that leguminosae and nodule bacteria can form root nodules to immobilize nitrogen in atmosphere so that addition quantity of a chemical nitrogen fertilizer is reduced. The fertilizing method aims to the nutrient characters that topsoil in Northwest region is low in carbon (organic substances), is lack in nitrogen and phosphorus and is rich in potassium. On the basis of recommended nitrogen application quantity in soil testing formula, the nitrogen fertilizer is applied with the quantity reduced by 30%, wherein the ratio of immobilized nitrogen (N) to phosphorus (P2O5) to potassium (K2O) is 1:1:0.5. The fertilizing method employs a base fertilizer including 50% of a nitrogen fertilizer, 100% of a phosphorus fertilizer, 70% of a potassium fertilizer and 100% of an organic fertilizer and a topdressing including 50% of the nitrogen fertilizer and 30% of the potassium fertilizer. The fertilizing method provides technical guarantee to achievement of a three-win situation comprising yield increasing of crop, improvement of soil fertility and environment-friendly fertilization under a potato-soybean relay intercropping mode in Northwest region. The fertilizing method has following beneficial effects: (1) the method promotes yield increasing of both potatoes and soybeans and increases economic benefit; (2) the method improves soil situation and soil fertility; (3) the method increases utilization rate of the fertilizers and reduces environment pollution; and (4) the method can regulate nutrients and prevents and treats diseases and pests in crop.

Description

technical field [0001] The invention relates to an agricultural fertilization method, in particular to a fertilization method for potato and bean intercropping. Background technique [0002] At present, China's nitrogen fertilizer consumption exceeds the maximum crop yield demand, and the nitrogen fertilizer surplus in the agricultural system has gradually revealed its impact on the environment. China's nitrogen fertilizer problem has become the core of the global nitrogen fertilizer problem. Nitrogen fertilizer management in the 21st century has become a key issue for China's sustainable development. It is imperative to change the concept of development as soon as possible, make full use of various nitrogen sources, match nitrogen fertilizer input with crop demand, and reduce environmental pollution while exerting the effect of nitrogen fertilizer on increasing production. [0003] China is the largest producer and consumer of nitrogen fertilizer in the world, contributing...

AI Technical Summary

Problems solved by technology

The existing potato fertilization technology mainly adopts one-time basal application or "one shot" fertilization method, resulting in low fertilizer utilization efficiency and environmental pollution

The existing technology is mainly based on chemical fertilizers, and the supplement of organic fertilizers is insufficient, resulting in the deterioration of soil physical, chemical and biological properties, and the four major fertility factors of soil water, fertilizer, gas and heat are out of balance.

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