A kind of water-saving cultivation method of rice with compartment ditch controlled irrigation

Abstract

The invention discloses a compartment trench controlled irrigating paddy rice water-saving culturing method. The culturing method comprise she following steps of ploughing the soil, digging trenches, forming compartments, direct broadcasting or transplanting paddy rice, managing moisture and managing the field. A compartment and trench mode is employed for paddy rice plantation; based on different paddy rice growth periods, a circulating irrigation process with humid compartment surface soil and formed by full trench water-half trench water or full trench water-dry trench is achieved; paddy field compartment trench water level can be visually tested and compartment surface soil humidity can be determined, so irrigating time and amount can be determined and present intermittent irrigation technology can be optimized; irrigation water can be conserved; rain water and irrigation water utilization rate can be improved; and paddy rice yield can be maintained or improved.

Description

technical field [0001] The invention relates to the field of rice cultivation, in particular to a method for water-saving cultivation of rice with box-furrow controlled irrigation. Background technique [0002] At present, my country's water resources are facing problems such as low per capita occupancy, uneven distribution among regions, prominent contradiction between supply and demand, low utilization rate, and serious water pollution. According to statistics, the total water shortage in my country is about 30-40 billion m3 per year. 3 . In the 1990s, the average annual farmland drought affected area was about 27 million hm 2 , resulting in an average annual reduction of about 20 billion kg of grain production, accounting for 4.7% of the total output. Rice is the most important grain crop in my country, and its total output accounts for 35% of the total grain output in my country. Rice is the crop that consumes the most water. Rice production consumes 30% of the world...

AI Technical Summary

Problems solved by technology

Shallow, wet, and sun-dried irrigation methods can reduce the amount of irrigation water, but for high-yield fields with high levels of fertilization and a lot of farm manure, it is of little significance to implement other paddy fields. A complete irrigation and drainage system is required, and its water-saving potential is limited; controlled irrigation methods can Reduce the frequency of irrigation and improve the efficiency of water and fertilizer use. It is mostly used in low-lying and prone to waterlogging fields. The irrigation indicators used are more complicated, which is not conducive to farmers' grasp; the rain storage irrigation method can make full use of natural rainfall and reduce the frequency and amount of irrigation, but at the same time require local Accurate weather survey; intermittent irrigation method can reduce irrigation and drainage times, increase rice drought resistance, enhance soil aeration, reduce incidence of diseases and insect pests, and is widely used in rice production in China, accounting for about 41% of the total area However, the existing water-saving methods judge whether to irrigate based on the wetness of the paddy field soil surface, the indicators are vague, farmers are not easy to grasp, and there are shortcomings such as poor popularization