镉低积累品种中安早7号肥料利用率研究

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中图分类号：S143 文献标识码：A 文章编号：1006-060X（2025）05-0033-05

引用格式：.镉低积累品种中安早7号肥料利用率研究[J].湖南农业科学，2025（5）：33-37.DOI：10.16498/j.cnki.hnnykx.2025.005.007

Abstract：Fieldplotexperimentswereconuctedtoeasureteiceyeldandteuulatioofitroge（N），osphorus（， potasum（K）inicegrains，stms，andleavs，ontebsisofichtheN，PandKfertlierutiizationefcieyofZoaao No.7'withlowcadmiumaccumulationwasstudied.TheresultsshowedthatthecombinedfertizationofNPKimprovedtheeconomic traits and significantly increased the yield of'Zhong'anzao No.7'，with the contribution rate of 30.4% to the yield. The contribution rate of single fertilizers to the rice yield was in a trend of N>P>K .The NPK treatment increased the accumulation of N，P，and K by 75.94% ， 24.64% ，and 14.47% compared with the N0PK ， NP0K and NPK0 treatments，respectively. The K accumulation under the N0PK treatment was 8.42% lower than that under the NPKo treatment. The nutrient coefficients of N， P2O5 ，and K2O under the NPK treatment were 2.12，0.92，and 3.62，respectively.'Zhong'anzao No.7' had a nutrient coeffcient for K2O 9.7% higher than the rice varieties of non-low cadmium accumulation.The N，P，and K utilization effciency under the NPK treatment was 47.35% 23.57% ，and 47.51% ，respectively. The K utilization efficiency was -27.38% under the N0PK treatment. The lack ofN，P，K elements exacerbated thedecreaseinsoilutrientcontent.TheresultsillstratedthatapplyingNPKfertilizerscansignificantlyimprovethefertizer utilizationrateandmaitainsoilertility.Zhong'anzaoNo.7hasagreaterdemandforKthantheicevarietiesofnon-lowcadmium accumulation，and thus atention should be paid to the applicationofK fertilizer inthecultivationofthis Variety.

Key Words：lowcadmium accumulation; early rice variety; NPK; utilization efciency of fertilizer; Ningxiang City

湖南省拥有多种有色金属矿产资源，是“有色金属之乡”。（剩余7488字）