不同质地土壤对高油玉米碳氮运转的影响

在池栽试验条件下,研究了壤土、粘土、砂土三种质地土壤对高油玉米碳氮积累和运转的影响。结果表明,高油玉米叶、茎、鞘等营养器官贮藏物质再运转量和再运转率及营养器官物质总运转量和运转率以砂土最高,成熟期子粒重及光合同化物输入子粒量和光合同化量对子粒重的贡献率均表现为粘土>壤土>砂土。成熟期子粒氮素含量主要来源于灌浆期子粒氮素吸收,子粒氮素总量和子粒氮素吸收量表现为粘土>壤土>砂土,各营养器官贮藏氮素转移率叶>鞘>茎。三种质地土壤对高油玉米子粒产量、淀粉、蛋白质和油分产量的影响均表现为粘土>壤土>砂土。

Effects of Soil Texture on Carbon and Nitrogen Assimilate Translocation in High-oil Corn

This paper studied the effects of different textural soils including clay, loam and sandy on carbon and nitrogen assimilate translocation in high-oil corn. The results showed that the amounts and remobilization rate of stored assimilates and total amounts stored assimilate in leaves, stem and sheathes were highest when the high-oil corn was planted in sandy. The grain weight and the amounts of stored assimilates transferred into grains, shown as Clay > Loam >Sandy. The amounts and remobilization rate of stored nitrogen and nitrogen accumulation in grains, shown as Clay > Loam > Sandy. Nitrogen accumulation in grains and the translocation of stored nitrogen in leaves, amounts of stored nitrogen in stem and sheathes, accumulated nitrogen into grains, shown as Loam > Clay > Sandy. Nitrogen export rate shown as Leaves > Stem > Sheathes. About the effects of soil texture to the grain yield, starch yield, protein yield and oil yield, clay was highest, sandy was lowest. Some suggestions were also put forward for realizing high yield and quality of high-oil corn.