A high-yield and high-efficiency cultivation technique for dry direct-seeding rice

Abstract

The invention discloses a cultivation method for drily direct-seeding rice. The cultivation method comprises the following steps: A. dry soil preparation: drily ploughing and preparing the land, and raking the land thoroughly; B. application of fertilizer: during the whole growth period, the dosage of nitrogen phosphorus and potassium being 10-13 kg of N, 4-6 kg of P2O5 and 5-8 kg of K2O per mu (a unit of area, equal to 0.0667 hectares), wherein the nitrogen phosphorus and potassium in the base fertilizer is 40%, 100% and 50% of the planned dosage in the whole growth period; C. seed selection and coating: selecting high-yield large-panicle type or intermediate form type of rice seeds, utilizing a special dry cultivation seed coating agent to be mixed with the seeds; D. sowing: sowing the seeds in the last twenty days of April and the first ten days of June at a seed amount per mu of 1.5-4.0 kg; E. weed control: utilizing a weed control method of removing the weed, utilizing a herbicide and supplementing the rice seeds; F. water management: taking rainwater cultivation as a main manner from the seedling emergence period to a three-leaf and one-core period, and conducting flood irrigation from the three-leaf and one-core period to two weeks before harvesting; G. integrated control of diseases and pests. With adoption of the high-yield and high-efficiency cultivation technology for the drily direct-seeding rice, the average yield per mu is 608.7 kg, which is not lower than the conventional transplant planting pattern; furthermore, the moisture production efficiency and the grain nitrogen production efficiency are both obviously higher than that of the conventional transplant planting pattern.

Description

technical field [0001] The invention belongs to the technical field of crop cultivation, and more specifically relates to a method for high-yield and high-efficiency cultivation of dry-directed rice. Background technique [0002] Excessive water consumption is an important problem in rice production in my country. 95% of my country's rice planting area is irrigated rice, and rice irrigation water accounts for about 50% of agricultural water use. Excessive water consumption in rice production leads to extreme shortage of water resources and low water use efficiency. In the past 10 years, the average annual agricultural irrigation water shortage is 30 billion m3, and the annual drought-affected area is 20-26 million hm2. Even in the south with abundant water resources, 1.6-2 million hm2 of rice production is severely reduced each year due to seasonal drought. It is estimated that the national irrigation water utilization coefficient is only about 0.5, and 1m 3 The rice prod...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is aimed at the deficiencies in the existing cultivation techniques of dry-directed rice, and is to provide a method for high-yield and high-efficiency cultivation of dry-directed rice, which solves the problems of low seedling emergence rate, serious weed damage, and low yield in conventional cultivation of dry-directed rice. High and low nitrogen use efficiency

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