A kind of in-situ application method of three-stage green manure in tobacco field

Abstract

The invention belongs to the technical field of crop rotation cultivation, and discloses a three-stage in-situ application method of green manure in a tobacco field, which selects a planting area that meets the planting requirements of flue-cured tobacco and takes into account the basic growth requirements of rice, green manure, and fresh corn; the selection meets the technical requirements In the first year, flue-cured tobacco-rice-green manure is planted sequentially, in the second year fresh corn-rice is planted sequentially, in the third year flue-cured tobacco-fresh corn is planted sequentially, every three years is a farming cycle; green manure milk vetch 7 to 10 days before sowing fresh corn sowing in spring, plow to cover green; fresh corn stalks are returned to the field to fertilize and improve the soil. The invention injects a large amount of green manure materials into the soil in three stages within one cultivation cycle, effectively solves the problem of soil suitability degradation caused by continuous cropping and insufficient organic matter supplementation in southern Anhui tobacco planting soil, and has good economic, social and ecological benefits.

Description

technical field [0001] The invention belongs to the technical field of crop rotation cultivation, and in particular relates to a three-stage in-situ application method of green manure in tobacco fields. Background technique [0002] Green manure refers to all the whole plant or some part of the tissue of green plants that can be plowed into the soil as fertilizer. Returning green manure to the field significantly improves soil fertility, improves soil physical and chemical properties, and effectively improves crop yield and quality. In order to break the bottleneck that restricts the improvement of tobacco leaf yield and quality, a large number of studies in tobacco areas have pointed out that the use of crop rotation, planting and using green manure, and the use of organic fertilizers to improve soil can produce significant results. Anhui Tobacco and Rice Area uses milk vetch as conventional green manure for paddy fields, and the whole growth period spans from mid-October ...

AI Technical Summary

Problems solved by technology

In this method, the green manure is directly returned to the field to receive the flue-cured tobacco. The green manure decomposes for a limited time, and it is prone to the problem of fertilizer competition between the early stage of green manure decomposition and the growth of flue-cured tobacco seedlings. During the process of seedlings, decomposed substances release nutrients in the later stage, resulting in excess nutrition in flue-cured tobacco, and the tobacco plants are not yellow, which directly affects the maturity process of tobacco leaves

In addition to their own limitations, these three patented methods also have common features. There is no stubble pressure on autumn grain crops after the planting mode is smoked, and the method of using green manure is single. The green manure crops planted in situ are only used as the only green manure source. The feasibility of high-quality crop straw as a supplementary green manure

[0004] Anhui, as a double-cooking tobacco and grain production area, still needs to solve the following problems in the use of green manure: 1. The growth time of green manure is not enough

2. Due to insufficient growth time, the biomass of green manure growing in situ is insufficient

Insufficient input of green manure directly leads to ineffective improvement of various soil properties, wasting labor and cost input

Thirdly, when the green manure is overturned and decomposed in the tobacco ridge in the current season, a large amount of nitrogen decomposed by the green manure in the tobacco ridge will generally be consumed, which will affect the nitrogen nutrient absorption of the flue-cured tobacco at the seedling stage, resulting in weak seedlings and affecting the yield of tobacco leaves in the later stage

Images