Rice planting water management method for improving water storage of winter paddy field

Abstract

The invention discloses a rice planting water management method for improving water storage of a winter paddy field. The method comprises the steps that from a transplanting stage to a tillering stage, the water level of the paddy field is controlled to be between 3 cm and 6 cm; from the tillering stage to a booting stage, the water level of the paddy field is kept within 20 cm; from the booting stage to a maturation stage, the water level of the paddy field is kept within 6 cm. According to the further technical scheme, from the transplanting stage to the tillering stage, the water level of the paddy field is 3 cm to 6 cm; from the active tillering stage to the booting stage, the water level of the paddy field is kept within 20 cm. From the active tillering stage, on the premise of not influencing the growth of rice, the upper limit of the irrigation depth of the paddy field is improved, therefore, the abundant rain period is utilized, natural rainfall resources are stored to the maximum extent, the rainwater loss is reduced, the water storage of the paddy field is improved, the drought resistance ability of the paddy field is improved, the irrigation cost of the paddy field is lowered, and the function of saving cost and improving the effect are obvious.

Description

technical field [0001] The invention relates to a water management method for rice planting, in particular to a water management method for rice planting in winter paddy fields, so as to increase the water storage capacity of winter paddy fields. Background technique [0002] Winter paddy field refers to the paddy field that stores water in winter to plant rice in the next year. It is a unique type of paddy field in Southwest my country. Mainly concentrated in Sichuan and Chongqing, the perennial winter water (leisure) fields are maintained at about 10 million mu, and the rice field planting system is mainly based on "winter water fields-hybrid rice or ratooning rice". In the valleys along the rivers and hills below 400 m above sea level in Sichuan and Chongqing, the average temperature is 17-18.5°C, the active accumulated temperature ≥ 10°C is 5000-6200°C, the annual sunshine hours are 1200-1400 hours, and the annual rainfall is 1000-1200mm, but the seasonal distribution is...

AI Technical Summary

Problems solved by technology

[0007] This paddy field water management technology of turning green in deep water in the early stage (transplanting-tillering), enough for seedlings to dry the field, shallow water irrigation in the middle stage (ear differentiation-booting), and alternating dry and wet in the later stage (booting-mature) is conducive to high rice yield, but it is greatly improved. The water storage capacity of winter paddy fields is reduced, and a lot of rainwater resources are wasted

Because in the rainy period from May to August, according to the high-yield paddy field water management technology, the paddy field is required to keep shallow water or dry and wet alternately, so that a large amount of rainfall is lost, and when the high temperature and summer drought come, the paddy field has no guaranteed irrigation water source to fight the drought and needs pumping Irrigation increases growing costs

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