Rice field milk vetch uncovering and pressing method

Abstract

The invention discloses a rice field milk vetch uncovering and pressing method, which comprises the following steps: a) field ditch cleaning dewatering: in the milk vetch growth period, dredging and cleaning a drainage ditch for a milk vetch planting land for growing field crops, and ensuring that the highest water level of the land surface of the field is not higher than 0.5cm; b) the dry ploughing of the milk vetch: in the full-bloom stage of the milk vetch, turning over the milk vetch when the water height of the land surface of the field is 0.25-1.25cm; c) shallow water moisture management: after the milk vetch is uncovered and pressed, maintaining that the field is provided with water and the highest water level is not higher than 1.25cm, bubbling the milk vetch for 3-8 days to carry out rice field raking, fertilization and early rice transplanting production projects; and d) early rice shallow water management: after the early rice is transplanted, ensuring that the water height of the water surface of the field is less than 3cm. According to the rice field milk vetch uncovering and pressing method disclosed by the invention, the milk etch biomass and the nutrient accumulation amount are optimal, the turning over power demand is lowered, the reductant toxic substance is reduced, and the labor efficiency is sharply improved.

Description

technical field [0001] The invention relates to a method for overturning milk vetch in paddy fields. Background technique [0002] China is one of the earliest countries in the production and utilization of green manure in historical records, and it is also the country with the largest cultivation area. Green manure has played an important role in my country's agricultural production and national food security. After the founding of New China, the Chinese government and all sectors of society have fully realized the important role of green manure in activating and enriching soil nutrients, improving crop yield and quality, and fertilizing soil in agricultural production. Therefore, my country's green manure development is very rapid. The green manure planting area in my country has grown from 26 million mu at the beginning of liberation (1950) to about 180 million mu at the end of the 1980s, accounting for 1.7% of the total cultivated land in the country to 12.5%. During ...

AI Technical Summary

Problems solved by technology

The problems caused by this traditional method of overturning milk vetch are as follows: 1. There is a lot of rain in April in the south. When retting milk vetch under flooded conditions, it often causes flooding in rice fields and produces runoff, which makes milk vetch in the water. The nutrients released during the retting process are lost with the runoff, which not only reduces the utilization effect of milk vetch, but also causes agricultural non-point source pollution and waste of resources; The decomposition of milk vetch residues will easily produce reducing substances, which will damage the root system of seedlings, thus causing early rice "stiff seedlings". In the modern early rice production season, farmers often overturn milk vetch in the middle and late March. At this time, the biomass of milk vetch is not high, and the nutrient accumulation is not much, which cannot meet the planting and utilization requirements of milk vetch. The best effect; 4. Flooded plowing milk vetch needs to increase the power of modern agricultural machinery, but the speed of traditional cattle flood plowing milk vetch is very slow, and the physical exertion of cattle is relatively large

Therefore, the traditional milk vetch overturning technology is not suitable for the requirements of modern agricultural development, and this series of problems has become one of the important technical problems hindering the development of milk vetch in southern rice fields.