Method of controlling weeds in no-tillage dry direct seeding paddy rice field

Abstract

The invention provides a method of controlling weeds in a no-tillage dry direct seeding paddy rice field. The method comprises steps of dry-spreading paddy rice seeds before wheat harvest, stubble cleaning with glufosinate-ammonium mixed with water after wheat harvest, watering three days after glufosinate-ammonium is sprayed until straws are fully immersed into water, and irrigating and conducting high-yield cultivation management after field water naturally dries and two-leave period after paddy rice sprouts out. The wheat is harvested with stubble height of 15 to 18cm; and after the wheat is harvested, wheat straws are smashed and evenly scattered into the field. Weed growth in the dry direct seeding paddy rice field can be effectively controlled; comprehensive field weed controlling rate can reach 90% above, and direct seeding paddy rice weeds can be effectively controlled via one time stubble cleaning work, so paddy rice growth can ripe early and output of dry direct seeding paddy rice can be improved; fertilizer use can be reduced by over 20%; glufosinate-ammonium with concentration of 20% is utilized for once, so fertilizer use times can be reduced by one to two times compared with a common direct seeding paddy rice field weed eliminating method; and chemical pesticide use for weed elimination can be reduced by over 50% compared with a common weed elimination method.

Description

technical field [0001] The invention relates to the technical field of agricultural planting, in particular to a method for controlling weeds in no-tillage dry-directed rice fields. Background technique [0002] Direct-seeding rice is an ancient rice cultivation method. According to historical records, rice in my country was originally planted by direct-seeding. It was not until the Han Dynasty that seedling cultivation and transplanting were invented. It has been thousands of years since the earliest adoption of direct seeding cultivation. After the 1950s, upland rice with different cultivation and management methods continued in North China and Northeast China. One is dry-planted water-pipe cultivation at the seedling stage and long-term later stage, which is called dry-planted water-pipe cultivation; the other is dry-planted dry-pipe rice, called Dry farming, these two methods are all using dry direct seeding cultivation. In the 1970s, in order to cope with the serious ...

AI Technical Summary

Problems solved by technology

However, due to the long-term use of chemical herbicides with limited varieties, the occurrence and development of drug-resistant weed populations, cross-resistance and multi-resistant weeds have brought great difficulties to the green management of weeds in crop fields at this stage.

At present, the relevant research on the monitoring and control technology of resistant weeds in my country is obviously insufficient, the agricultural production lacks effective guidance, and the control technology is backward, which is mainly reflected in: (1) the lack of systematic research on the prevalence and catastrophe of most resistant weeds, and the new control Insufficient technical reserves; (2) The early warning technology for resistant weeds lags behind, especially the lack of rapid, effective, easy and simple detection technology at the seedling stage

At the same time, resistant weeds also lack effective monitoring measures and means; (3) The integration and optimization of existing resistant weed control technologies are insufficient, and an effective control technology system for major resistant weeds has not been established; (4) ) In the past 20 years, various pesticide companies in the world have failed to develop a new herbicide variety, and there is a lack of new herbicide varieties that can effectively control resistant weeds; (5) insufficient research on the formation mechanism of resistant weeds makes it difficult to find new (6) The application of modern advanced technologies such as biotechnology and information technology in the control of resistant weeds is still at the stage of theoretical research, and there is still a distance from practical application; (7) Chinese farmers lack Grass monitoring and self-governance capabilities, in production, it is not possible to "prescribe grass" and focus on "treatment" rather than "prevention". Misuse, abuse, and excessive use of chemical herbicides are common