The Study on the Physiological Mechanisms to Increase Yield of the Simplified Methods of Cultivation Millet

doi:10.7668/hbnxb.2010.S2.018

Abstract

Abstract: "The Sethoxydim Resistant varity 528-4 and inresistant varity 528-5 of Jigu 25 were used for material of the experiment,these varieties were all selected and bred by institute of millet crops,Hebei academy of agricultural and forestry science.All organs dry matter accumulation in the course of bearing and yield and weeding control(effect of Jigu 25 by chemical treated and summarized seedling and normal managed were determined and analysised to reveal the physiological mechanism that simplify cultivaled Jigu 25 could not only chemical thin and chemical weed,but also increase yield certainly.The results showed that:The weeding effect of simplify cultivaled Jigu 25 was up to 95%,and yield was increased by 8.73% compared to CK.The physiological mechanism of its output was showed:①simplify cultivation treatment early thinned and weeded,reduced weeds and excess millet seedling in competite nutrients and space,played a role to strong seedlings.②Biomass of simplify cultivation treatment was higher in two key accumulation stages of the jointing to heading,flowering and grain filling to maturity,and growth faster.③Root of simplify cultivation treatment developed better from seedling to jointing than others,it has laid a good foundation for development of vegetative growth and reproductive growth better.After into heading and flowering stage,stem growth peak,stop elongation,then decreased rapidly,indicated that after accessed to reproductive stage,matter of simplified cultivation treatment transformated more and more quickly compared with summarized seedling and normal managed treatment.After the leaf area of simplify cultivation treatment reached the maximum in the flowering period,there was a long period of stability to the high luminous efficiency of photosynthesis,photosynthate into grain more.In the peak period of grain filling to form a dough stage,volume of dry matter accumulation bigger,the speed of accumulation higher,therefore the rate of seed higher. "

Key words: Simplified methods of cultivation, Millet, Chemical thinning, Chemical weeding, Dynamico frelative dry matter accumulation, Yield

CLC Number:

S515

XIA Xue-yan, SHI Zhi-gang, CHENG Ru-hong. The Study on the Physiological Mechanisms to Increase Yield of the Simplified Methods of Cultivation Millet[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2010, 25(S2): 79-83. doi: 10.7668/hbnxb.2010.S2.018.

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