Planting method for common vetch crop rotation of organic paddy fields

Abstract

The invention provides a planting method for common vetch crop rotation of organic paddy fields. The method comprises the following specific steps: (1) reaping paddy rice and reserving high stubbles: reserving the high stubbles of 45cm to 55cm of rice straws during paddy rice reaping, threshing reaped rice straw parts, and then, uniformly spreading the threshed reaped rice straw parts into the organic paddy fields; (2) uniformly broadcasting seeds promptly: sowing common vetch promptly in 15 days after paddy rice reaping according to the density of 4kg / mu to 4.5kg / mu; and (3) forming three kinds of ditches to prevent waterlogging: after the common vetch is sown, forming perimeter ditches, transverse ditches and compartment ditches in big fields in a matched manner, and forming the perimeter ditches and the compartment ditches only in small fields, so as to meet the requirements on obvious water drainage and hidden water filtration. According to the method, through reserving high rice stubbles by using principles of ecology, the ecological environment of common vetch (green manure) growth fields is improved, the upright growth of stems and vines of the common vetch is promoted, the unit-area yield of the common vetch is increased, the yield per mu of fresh grass is 2,000kg to 2,500kg and is increased by two times or more compared with that before improvement, the green manuring and field fertilizing actions of the common vetch (green manure) are exerted efficiently, and the organic paddy field is fertilized rapidly.

Description

Technical field [0001] The invention belongs to the technical field of agriculture, and relates to a method for rotating green manure in an organic rice field, in particular to a method for planting vetch pea in an organic rice field rotation. Background technique [0002] "Organic rice-green manure" crop rotation is the most direct and effective agronomic measure to improve the fertility of organic rice fields, adjust soil pH, and increase the content of soil organic matter. However, the crop rotation green manure planting method is different, the fresh grass yield per unit area varies greatly, and the effect of improving soil fertility is completely different. [0003] There are currently two methods for planting green manure in rice field rotation: (1) interplanting and sowing green manure seeds at the late stage of rice filling (mid-to-late August); (2) creating green manure seeds after rice harvesting (late September and early October). [0004] The main disadvantages of the ab...

AI Technical Summary

Problems solved by technology

[0005] (1) Sowing green manure seeds in the late stage of rice filling, first, the amount of seeds used is higher, 0.5-1kg more than that of rice after harvesting; second, the emergence rate cannot be guaranteed, and it is affected by the accumulation of water in the field and the upper 3 leaves of rice plants. Due to the influence of factors such as the angle between the stem and the stem and the long time of shade in the field, the emergence rate in the field is only 30-40%, and the basic seedlings of green manure are seriously insufficient; the third is that a reasonable high-yield group cannot be formed, and the yield of fresh grass is low. 400 kg, can not play the role of fertilization;

[0006] (2) Sow green manure seeds immediately after the rice is harvested. Although it overcomes the disadvantages of sowing green manure seeds in the later stage of grain filling, the habitual short stubble is not conducive to the normal and robust growth of green manure. 40cm), the green manure stems have no support to climb, they can only grow prostrate and cannot grow upright, and the growth slows down; second, due to the prostrate growth of green manure, the lower parts of the stems are crowded with each other, which is not ventilated, ventilated and light-transmitting, and is easy to be susceptible to disease and rot; The third is that the upper part grows vigorously but the lower part grows poorly. The green manure growth environment is poor, and it is difficult to obtain high yields of fresh grass. Generally, the yield of fresh grass is 800-1200 kg per mu.