Northern cold region china-hemp field weed chemical weeding method

Abstract

The invention belongs to the technical field of agricultural planting, and particularly relates to a northern cold region china-hemp field weed chemical weeding method. The method comprises the following steps of 1, sealing soil; using 96-percent metolachlor for performing soil spraying sealing treatment; 2, performing stem and leaf treatment: using 56-percent MCPA-Na powder and 24-percent clethodim emulsifiable concentrates for mixing for stem and leaf treatment in the 3-leaf period of the weed according to the weed coming-up conditions. The method solves the generally exiting problems of laggard culture measure, single weed prevention and control technology and no special china-hemp weeding agent in the market after the scaled planting of the china-hemp. By using the method for chemically removing field weed of the china-hemp, the prevention effect on the weed is as high as 87.56 percent; the field weed harm of the china-hemp can be basically eliminated; after the pesticide application, inhibition and pesticide harm are not generated on the china-hemp plant growth; the seedling growth of the china-hemp is regular; the development is normal.

Description

technical field [0001] The invention belongs to the technical field of agricultural planting, and in particular relates to a method for chemically weeding weeds in hemp fields in northern cold regions. Background technique [0002] Hemp is an annual herbaceous plant of Magnoliopsida, Urticales, Cannabinaceae, Cannabis, Cannabis Sativa L., usually dioecious, and sometimes monoecious of. Hemp has strong adaptability and is easy to grow. It is one of the earliest crops cultivated by humans. As a very characteristic traditional industry in our country, the hemp industry occupies an important position in our country's economic system. my country's hemp and flax fiber production exceeds 20% of the world's production. Because cannabis contains the hallucinogenic and addictive substance tetrahydrocannabinol (THC), it can act on the human nervous system and has strong addictive and narcotic properties. Sex, was used by some criminals to make drugs, so many countries began to ban th...

AI Technical Summary

Problems solved by technology

Weeds affect the yield and quality of crops mainly by competing with crops for water, fertilizer, sunlight, and growth space. The inclusion of weeds and seeds in agricultural products makes the quality of agricultural products significantly lower

(2) Prevention and control of weeds causes a substantial increase in agricultural production costs. During the harvesting and processing of agricultural products, labor costs will be increased, work efficiency will be reduced, and production costs will be virtually increased.

(3) If a large number of weeds are mixed in the hemp field, it will bring difficulties to mechanical or manual harvesting, increase power consumption and labor costs, and also cause damage to harvesting machinery

Due to the impact of the policy, there has been no large-scale planting of hemp planting. Yunnan Province is the first province in the country to promulgate and implement local regulations on hemp planting. Heilongjiang Province also formulated local management regulations on hemp planting in 2017, which makes The planting and management of hemp has laws to follow, which enhances the enthusiasm and legitimacy of hemp planting. After the large-scale planting of hemp, there are generally problems such as backward cultivation methods and single weed control technology.

The planting area of ​​hemp in Heilongjiang Province has grown from tens of thousands of mu at the beginning to more than 200,000 mu at present, accounting for a relatively low proportion of the planting area of ​​crops. Due to the high research and development costs of pharmaceutical manufacturers, there is no special hemp herbicide available on the market

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