磷 > 鉀；NPK處理水稻比 N<sub>0</sub>PK 處理的氮積累量增加 75.94% ，比 NP<sub>0</sub>K 處理的磷積累量增加 24.64% ，比 NPK<sub>0</sub> 處理的鉀積累量增加 14.47% ，但 N<sub>0</sub>PK 處理的鉀積累量比 NPK<sub>0</sub> 處理降低了 8.42% ；NPK處理的養(yǎng)分系數(shù)N、 P<sub>2</sub>O<sub>5</sub> 、 K<sub>2</sub>O 分別為2.12、0.92、 3.62kg ，中安早7號(hào)對(duì) K<sub>2</sub>O 需求的養(yǎng)分系數(shù)比非鎘低積累品種高 9.7% ，NPK處理水稻的氮磷鉀肥利用率分別為 47.35% 、 23.57% 和 47.51% ， N<sub>0</sub>PK 處理的鉀肥利用率為 -27.38% ；缺素處理加劇了土壤養(yǎng)分含量的降低。這說(shuō)明氮磷鉀肥配合施用能顯著提高肥料利用率，較好地保持土壤肥力，中安早7號(hào)對(duì)鉀的需求量較非鎘低積累水稻品種大，在生產(chǎn)中應(yīng)注意增施鉀肥。-龍?jiān)雌诳W(wǎng)" />

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鎘低積累品種中安早7號(hào)肥料利用率研究

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中圖分類號(hào)：S143 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1006-060X（2025）05-0033-05

引用格式：.鎘低積累品種中安早7號(hào)肥料利用率研究[J].湖南農(nóng)業(yè)科學(xué)，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

湖南省擁有多種有色金屬礦產(chǎn)資源，是“有色金屬之鄉(xiāng)”。（剩余7488字）

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