Sowing time and density management method and system in early-autumn wheat cultivation

Abstract

The invention belongs to the technical field of agricultural production and discloses a sowing time and density management method and system in early-autumn wheat cultivation without irrigation. In the method, early-autumn wheat growing period, economic characters and stem tiller trend are analyzed, yield components of comprehensive characters of effective panicles, ear grains and thousand kernelweight are analyzed, and the sowing time is (from 20th August to 10th September) ( 30-40 days earlier as compared with that in the prior art); wheat seedlings are in abundant rainfall from seedling tocutoff, frost weather is staggered during the booting and flowering periods, and heat-forced maturity from pulp filling to maturity periods; the density is in 200-250 thousand per mu. The effective panicle, maturing rate, thousand kernel weight and the like can be effectively increased by relying on ear bearing of main stems, and the yield is significantly higher than that of wheat under existingconditions.

Description

technical field [0001] The invention belongs to the technical field of agricultural production, and in particular relates to a method and system for managing seeding time and density in early autumn wheat cultivation. Background technique [0002] More than 80% of Yunnan's wheat production is in mountainous areas, without irrigation conditions, mainly relying on natural rainfall to meet the water demand of wheat, poor production infrastructure, weak ability to resist natural disasters, drought and little rain in winter and spring in Yunnan, currently wheat is mainly rotated with corn, and the sowing time is 10 From late March to early November, in the production process, the rain is heavy during the seedling emergence period, low temperature frost is often encountered during the booting and flowering period, and high temperature in the later period forces ripening. Therefore, the wheat yield per unit area in Yunnan Province is about 140 kg / mu, which is far lower than the natio...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, wheat sowing time is the period with the most concentrated rainfall in the whole year, and the quality of soil preparation is difficult to meet the requirements, and it is necessary to increase the sowing to ensure the basic seedlings. Because the soil moisture is too heavy, the seedlings are weak and the tillers are insufficient; the wheat seedlings enter the jointing stage Afterwards, the rainfall was relatively low, and field management measures such as topdressing could not be implemented. The booting and flowering period is generally at the lowest temperature period of the year, and it is easy to suffer from freezing damage. Under the dual influence of high temperature and drought in the ripening period, the thousand-grain weight decreases, matures early, and the product is poor.

[0005] The problem existing in the existing technology is the inevitable contradiction between specific climatic conditions and production conditions. The only way to solve this contradiction is to rationally arrange the farming system and management techniques according to the wheat growth and development process to adapt to the specific climatic environment.

Images