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《Journal of Northeast Agricultural University》 2011-04
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Effect of potassium employ phase on rice yield and panicle fructi-fication

LIU Lihua1,ZHAO Yongjing2,LI Mingjie3,LV Yandong1,ZHENG Guiping1(1.College of Agronomy,Heilongjiang Bayi Agricultural University,Daqing Heilongjiang 163319,China;2.Qiqihar Reclamation Branch Agricultural Bureau,Qiqihar Heilongjiang 162116,China;3.Zhaoyuan Farm,Daqing Heilongjiang 166517,China)  
Randomized block design was used to study effects of potassium employ phase on rice yield and panicle fructification.Results showed that when 5:5 ratio basal fertilizer and panicle fertilizer of total K was applied(Treatment 4),K fertilizer was balanced during the whole rice growing period,and it was conducive to differentiation of spikelet and add grains per panicle,which got the highest yield,up to 13 240.52 kg·hm-2.When basal fertilizer of total K was applied(Treatment 1),owing to inadequate supply of the rice nutrients during booting and grain filling period,rice panicle length,numbers of primary branches and secondary branches were reduced,the empty grain rate and unfilled grain rate of superior grain were increased,and filled grain rate of superior grain were reduced,resulting in the lowest yield for 11 101.02 kg·hm-2.Yield of treatment 4 was more than 19.27% higher than that of treatment 1.It got higher yield when 5:5 ratio basal fertilizer and panicle fertilizer was applied than that of using basal fertilizer of total K.
【Fund】: 黑龙江省科技攻关子课题(GA09B102-4)
【CateGory Index】: S511
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