A method for suppressing strong seedlings of wheat after sowing based on rice straw returning to the field

Abstract

The invention discloses a wheat after-sowing compacting seedling strengthening method based on rice straw returning application.The method includes the steps that when rice is harvested, base fertilizer is applied in time after rice straw returning application, and a stubble cleaning rotary cultivator is selected for work, wherein the rotary tillage depth is required to be 12-15 cm, and the rice straw burying rate is larger than or equal to 80%; a cylindrical compacting machine and a 15-20-horsepower walking tractor are selected, and compacting is conducted within 0-10 days after wheat is sown, wherein the compacting strength ranges from 1.5*104 Pa to 2.8*104 Pa, and the absolute moisture content of clayed soil and partially sandy soil needs to be smaller than or equal to 24%; mechanical ditching is conducted in time after compacting is finished, inside and outside three-ditch matching is conducted, ditch mud is evenly thrown, coverage is improved, exposed seeds are reduced, and anti-freezing seedling conservation is achieved.According to the method, the volume weight of soil sowing layers can be increased, the defects that soil is too loose and ventilation water consuming is rapid due to straw returning application are reduced, soil moisture preserving capacity is remarkably improved, seeds and soil are more tightly jointed, seedling emergence of wheat is promoted, and full stand of seedlings is achieved at a time of sowing; the quality of the wheat seedlings is improved, the anti-freezing capacity of the wheat is improved, and the full stand of the seedlings, seedling homogenizing and seedling strengthening can be achieved.

Description

Technical field [0001] The invention belongs to the technical field of crop seeding, and specifically relates to a method for suppressing strong seedlings of wheat after sowing based on returning rice straw to the field. Background technique [0002] Rice stubble wheat is the main crop type of wheat cultivation in Jiangsu Province. In recent years, due to the influence of late-maturing rice varieties, direct seeding or machine-transplanting technology, and straw returning to the field, rice stubble cultivation is more difficult, wheat seeding quality is poor, and seedlings emerge. The phenomenon of weak and uneven, yellow seedlings and dead seedlings in winter and spring are more common, which has become one of the main bottlenecks affecting the stable and high yield of wheat in Jiangsu rice stubble. [0003] Suppression is a traditional wheat cropping technology with high yield and resistance to stress, which has been widely used in arid and rainless areas in my country. Related ...

AI Technical Summary

Problems solved by technology

[0002] Rice stubble wheat is the main stubble type of wheat cropping in Jiangsu Province. In recent years, affected by comprehensive factors such as late-maturing rice varieties, direct seeding or machine transplanting techniques, and straw returning to the field, it has become more difficult to tillage rice stubble, and the quality of wheat sowing is poor. Weak and uneven, yellow seedlings and dead seedlings are common in winter and spring, and have become one of the main bottlenecks affecting the stable and high yield of rice stubble and wheat in Jiangsu