High-yield and high-efficiency cultivation technology for drily direct-seeding rice

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.