Efficient and environment friendly irrigation method for rices in cold region

Abstract

The invention provides an efficient and environment friendly irrigation method for rices in a cold region, which relates to a rice irrigation method. The invention is to solve problems of water waste, low water production efficiency, poor resistance ability and low rainwater utilization rate in the traditional irrigation method for the rices in the cold region. The method comprises the following steps of: first irrigating the rices according to water usage of 80-120 m3 / acre in a field dipping stage of the rice; and then dipping the field for 3-5 days; controlling water usage of a rice field in a rice seedling establishment stage, an early tillering stage, a middle tillering stage, a jointing-booting stage, a heading-flowering stage and a milk-ripe stage between a lower limit and an upper limit, wherein the lower limit is that the water content in the soil of the rice field is the saturated water content of 70-90%, and the upper limit is that the water depth of the rice field is 0.1-3 cm; keeping the water content in the soil of the rice field at the soil saturated water content of 70-80% in a later rice tillering stage; and supplementing once irrigation to the rice field in an early rice yellow ripening stage; and then naturally drying the rice field by air. The efficient and environment friendly irrigation method for the rices in the cold region, provided by the invention, is mainly used for irrigating the rices in the cold regions.

Description

technical field [0001] The invention relates to a rice irrigation method. Background technique [0002] In the early 1950s, our country began to explore various water-saving rice cultivation, and proposed the cultivation technology of timely baking the field. Shallow water irrigation technology was implemented in the 1960s, and until shallow wet irrigation was proposed in the mid-1970s, rice cultivation still did not deviate from the traditional flood irrigation method. The traditional rice irrigation technology in my country is represented by the water status of the paddy field and its adjustment method. It can generally be divided into long-term water layer maintenance, long-term water layer combined with sun-dried or wet, long-term dry-dry-wet type without water layer, and long-term water-free layer. There are four types of combination of water layer, wet and dry fields. After entering the 1980s, the rice shallow-humidity irrigation experiment was successful (Mao Shunlai...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of water waste, low water production efficiency, low irrigation water utilization efficiency and low rainwater utilization rate in the existing cold area rice irrigation method; and provide a cold area rice irrigation method with high efficiency and environmental protection

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