农业科学研究2023，Vol.44Issue(4)：15-20,6.
控释肥对水稻性状、产量的影响与最佳施用量研究
Study on the Effects of Controlled-release Fertilizer on Rice Traits and Yield and Optimal Application Rates
摘要
Abstract
In order to determine the optimal application amount of special controlled-release fertilizer(32-13-6)on dry direct seeding rice(water after sowing),Ningjing 43 was used as the test material,and four gradients of the application amount of controlled release fertilizer were set at 35 kg/667 m2,40 kg/667 m2,45 kg/667 m2 and 50 kg/667 m2.The results showed the following:① the yield of rice after applying controlled release fertilizer was higher than that of conventional application of chemical fertilizer(CK),with an increase of 0.82%～6.58%,and a fertilizer saving rate of 19.93%～37.72%.Under the experimental soil capacity condition,the recommended dosage of controlled release fertilizer was 41.0 kg/667 m2,and the corresponding yield was 783.12 kg/667 m2,with an increase rate of 40.46 kg/667 m2 compared to CK.② Plant height,panicle length,number of grains per panicle,and percentage of unfilled grains were significantly positively correlated with fertilizer application rate,while yield per mu(unit of land area)and thousand-grain weight were less correlated with it.③ Compared to CK,the controlled-release fertilizer treatment resulted in a reduction in nitrogen input by 0.62%～30.44%,phosphorus input by 8.45%～35.92%,and potassium input by 0～30.0%.However,the content of available nitrogen in the soil during the rice maturity stage increased by 7.32%～24.39%,available phosphorus content increased by 0.84%～11.44%,and available potassium content increased by 0.41%～8.83%.Additionally,the soil electrical conductivity decreased by 16.67%～75.00%.关键词
控释肥/水稻/施肥量Key words
controlled-release fertilizer/rice/fertilizer application rate分类
农业科技引用本文复制引用
解艳玲,张骞,马玲芳,罗园园,陈萍,夏学智,马文礼,谢静波..控释肥对水稻性状、产量的影响与最佳施用量研究[J].农业科学研究,2023,44(4):15-20,6.基金项目
测土配方施肥与化肥减量增效项目(20230075) （20230075）
