Dense soil paddy rice-saving irrigation method

Abstract

The present invention discloses a compact soil paddy water-saving irrigation method for paddy field whose percolation ratio is 3mm / d, and is characterized by that said method includes the following steps: before irrigation and rice transplanting using pressure machine to compact the rice field to make the dried volume weight of soil be greater than 1.4g / cu.cm or make the relative density be greater than 0.4 or make number of blows of standard penetration be more than 15 times; and ploughing the compacted soil, and the depth of ploughing is not less than 15 cm; ponding ploughed rice field and making water tillage, then making irrigation and planting rice in described rice field according to conventional method.

Description

technical field [0001] The invention relates to a water-saving irrigation method for rice, in particular to a water-saving irrigation method for rice in compact soil. Background technique [0002] my country is the oldest rice planting country in the world, with a rice farming history of about 7,000 years, and is one of the origins of cultivated rice in the world. my country's existing rice planting area is about 500 million mu, accounting for 30% of the sown area of ​​food crops, and it is the main food crop in my country. At the same time, my country is also a country that is very short of water resources, with a total of 280 million cubic meters of water resources. Accounting for only 5.6% of the world's total water resources, it is one of the 13 water-poor countries in the world. At present, agricultural water consumption accounts for 88% of the country's total water consumption, while rice water consumption accounts for about 70% of agricultural water consumption. The...

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Problems solved by technology

[0004] As we all know, dense soil seeps slower than loose soil. If the soil for rice planting can be compacted to a certain extent, a certain water-saving effect can be achieved. For this reason, the application number is 001237667, and the invention name is "a kind of impact compaction The method for saving water in paddy field soil body " has proposed a kind of compaction water-saving method, although can reach certain water-saving effect by its method, but from its disclosed content and embodiment, still have following problem, one is its It is required to dry the moisture content of the soil to 8-9% before compaction, which is difficult to achieve in rice planting areas. Second, the relevant indicators of compaction are not disclosed, which makes it difficult to control during operation. Its operability It is difficult for ordinary engineers and technicians to realize