Triple-cropping cultivation method for double cropping paddy field

Abstract

The invention discloses a triple-cropping cultivation method for a double cropping paddy field. According to the triple-cropping cultivation method, triple cropping of crops in a year is taken as a cycle; the triple-cropping cultivation method comprises: an annual soil crop rotation comprising rotary cultivation of early rice, and free cultivation of late rice and winter crops; an annual rice field paddy-upland rotation with the combination of upland cultivation of winter crops and paddy cultivation of early rice and late rice; and an annual straw crop cultivation method for returning straws of winter crops to field and not returning the late rice straws to field. Through the method, the problems of long-term soil monoculture, continuous cropping in winter space time, straw combustion and heavy metal pollution in the current double cropping paddy field can be avoided; the content of organic matter in the soil is increased, the soil nutrient storing capability is improved, the soil heavy metal Cd pollution is reduced, the farmland ecology environment is protected and the continuous, balanced and safety production of paddy rice is achieved.

Description

technical field [0001] The invention relates to a three-round cultivation method in a double-cropping paddy field. Background technique [0002] At present, the soil cultivation method of double-cropping rice fields in southern China is mainly mechanical rotary tillage, followed by traditional animal-drawn plowing, and no-tillage cultivation is still rarely used; while the planting mode of double-cropping rice fields in southern China is mainly winter fallow-double-cropping rice, followed by rapeseed -Double-cropping rice, milk vetch-double-cropping rice and other models; the treatment method of rice straw and winter crop straw in double-cropping paddy fields is mainly incineration, followed by turning over and returning to the field. Long-term plowing and rotary tillage of double-cropping paddy fields requires a lot of human and animal labor and fuel power, which is labor-intensive and time-consuming. The soil structure is damaged, which can easily lead to soil erosion, ser...

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Problems solved by technology

At the same time, due to the long-term continuous cropping of rice due to winter slack, it is prone to serious pests and diseases, lack of nutrients in the soil, deterioration of physical and chemical properties, and "poisoning" phenomenon of accumulation of harmful substances

Rice straw and winter crop stalks contain a lot of organic matter and nutrients needed by crops. Direct burning not only wastes precious resources, but also destroys soil structure, pollutes the air environment, and easily causes fires and traffic accidents; at the same time, with the rapid development of industry and agriculture Due to the impact of industrial "three wastes" and agricultural activities, the problem of heavy metal pollution in rice fields in the south is becoming more and more serious. Long-term rice straw and straw are returned to the field in full, and the heavy metal elements absorbed in rice straw and straw are also returned to the rice field, which is not conducive to the rice field. Reduction of heavy metals in soil

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