华北农学报Issue(1)：151-158,8.
减钾对华南早晚兼用型水稻产量形成、品质及钾吸收利用的影响
Effects of Reduced Potassium Fertilizer on the Yield Formation,Rice Quality and K Uptake and Utilization of Early/Late Season Rice in South China
摘要
Abstract
Effects of K fertilizer (Conventional N (225. 0 kg/ha),reduction of K by 28% (175. 5 kg/ha) and without K(0 kg/ha) ) on rice yield formation,rice quality and K uptake and utilization were studied using four vari-eties (Yuejingsimiao 2,Guixiangzhan,Huayou 8305 and Tianyou 998) in field experiment. Results showed that, compared with conventional K,reduction of K by 28% improved seed setting rate in Huayou 8305,increased both effective panicle numbers and seed setting rate in Tianyou 998 , which result in increase in yield;Guixiangzhan showed stable in yield due to increase in effective panicle numbers,seed setting rate and 1000-grain weight,but de-crease in grains number per panicle. For Yuejingsimiao 2, significant decrease in effective panicle numbers and grains number per panicle was found. Reduction of K by 28% improved rice quality in Huayou 8305,but showed unfavorable effect on milling quality in other experimental varieties. Moderate reduction of K showed no significant negative effects on physiological metabolism enzyme activity in flag leaf and grain,reduction of K by 28% was favor-able to improve K utilization. Reduction K application had different effects on the yield and quality of different vari-eties used in both early and late season.关键词
华南早晚兼用型水稻/减钾/产量形成/品质/钾吸收利用Key words
Early/late season rice ( Oryza Sativa L. )/Potassium reduction/Yield formation/Quality/K uptake and utilization分类
农业科技引用本文复制引用
莫钊文,李武,段美洋,潘圣刚,田华,唐湘如..减钾对华南早晚兼用型水稻产量形成、品质及钾吸收利用的影响[J].华北农学报,2014,(1):151-158,8.基金项目
国家“十一五”科技支撑计划项目(2007BAD89B14) （2007BAD89B14）
广东省农业攻关重点专项(2006A20303001) （2006A20303001）
广东省农业攻关项目(2004B20101007) （2004B20101007）
