土壤2025，Vol.57Issue(3)：518-523,6.DOI:10.13758/j.cnki.tr.2025.03.004
秸秆还田条件下高氮低钾型复合肥配施钾肥对双季稻产量和养分积累量的影响
Effects of High-nitrogen and Low-potassium Compound Fertilizer Combined with Potassium Fertilizer on Yield and Nutrient Accumulation of Double-cropping Rice Under Straw Returning Condition
摘要
Abstract
In this study,a field experiment was conducted under straw returning into the field,which included no potassium fertilizer(CK),high-nitrogen/low-potassium compound fertilizers containing nitrogen,phosphorus and potassium nutrients of 18%,12%and 10%(F),and F with potassium fertilizer(F+K)treatments.Then,the changes in yield,yield components,nitrogen,phosphorus,and potassium accumulations,and potassium fertilizer utilization rate of early and late rice under different treatments were analyzed.The results showed that compared with CK,the early rice yields under F and F+K were increased by 4.36%and 9.13%,the late rice yields were increased by 4.09%and 13.89%,and the total rice yields were increased by 4.22%and 11.65%,respectively.At the same time,the early and late rice yields under F+K were higher than those under F by 4.57%and 9.41%,respectively.The analysis of yield components showed that F+K mainly achieved rice yield improvement by increasing the number of spikes per plant in the early rice season,the number of spikes per plant and thousand grain weight in the late rice season.Because F+K increased the potassium contents in grains and straws,the accumulations of nitrogen and potassium in the early rice season under F+K were higher than those under CK by 12.30%and 22.40%,respectively,while the accumulations of nitrogen,phosphorus,and potassium in the late rice season under F+K were higher than those under CK by 11.89%,21.62%,and 26.59%,respectively.The results of both seasons also showed that the accumulations of nitrogen,phosphorus,and potassium under F+K were increased than those under CK by 12.07%,22.45%,and 24.54%,respectively,and they were improved by 9.34%,8.56%,and 11.28%higher than those under F.Due to the large amount of potassium brought in by straw return,there was no significant difference for potassium use efficiency between F+K and F,but the variability of potassium use efficiency under F+K was significantly reduced than that under F.Therefore,it is recommended that high-nitrogen/low-potassium type compound fertilizer should be combined with potassium fertilizer in southern double-cropping rice areas to achieve the goal of rice yield and efficiency improvement under straw return conditions.关键词
双季稻/复合肥/产量/每株穗数/钾肥利用率Key words
Double-cropping rice/Compound fertilizer/Yield/Number of grains per plant/Potassium use efficiency分类
农业科技引用本文复制引用
张美薇,夏立,樊剑波,韩天富,柳开楼,胡丹丹,吴艳,宋惠洁,夏晶,胡志华,徐小林..秸秆还田条件下高氮低钾型复合肥配施钾肥对双季稻产量和养分积累量的影响[J].土壤,2025,57(3):518-523,6.基金项目
国家自然科学基金项目(42367051)、国家科技基础资源调查专项项目(2021FY100504)和江西省省级引导市县发展专项资金(2022-8-13137)资助. （42367051）
