穂肥施用期对杂交稻叶片光合特性和干物质积累的影响  

Effects of Application Stage of Panicle Fertilizer on Leaf Photosynthetic Characteristics and Dry Matter Accumulation

作　　者：何小娥[1,2] 刘洋[2] 滕振宁 杨坚[1] 张玉烛[1,3] HE Xiao-e;YANG Jian;TENG Zhen-ning;Zhang Yu-zhu;LIU Yang(Hunan Agriculture University, Changsha 410128, PRC;Hunan Rice Research Institute, Hunan Agriculture Academy Science Changsha 410125, PRC;Hunan Hybrid Rice Research Center, Changsha 410125, PRC)

机构地区：[1]湖南农业大学农学院,湖南长沙410128 [2]湖南省农业科学院水稻研究所,湖南长沙410125 [3]湖南省杂交水稻研究中心,湖南长沙410125

出　　处：《湖南农业科学》2017年第5期10-13,16,共5页Hunan Agricultural Sciences

基　　金：基金项目:长江中下游双季稻优质丰产高效品种筛选及配套的机械化轻简栽培技术(2016YFD0300507)

摘　　要：对Y两优6号和Y两优900这2个杂交水稻品种的穂肥施用期进行了研究,结果表明:2个品种之间差异较小,穂肥施用期对各处理水稻的SPAD值、净光合速率和物质转运具有一定影响。抽穗至成熟期,处理E的SPAD值下降速度最慢,且在成熟期保持最高数值;净光合速率在处理D下降幅度最小,但在成熟期处理E处数值最高;Y两优900在处理D成熟期茎鞘物质输出率最低,Y两优6号在处理D成熟期茎鞘物质出现增重现象,说明2个品种在处理D中茎鞘物质没有被充分利用。Y两优6号产量与净光合速率和SPAD值呈显著正相关;Y两优900产量与净光合速率呈极显著正相关,与SPAD值呈显著相关;2个品种产量与茎鞘输出率和转换率负相关。与其他处理相比,孕穗6期施穂肥有利于延缓叶片衰老,提高净光合速率,以积累更多的光合产物。The stage of panicle fertilizer of two hybrid rice varieties,Y Liangyou6and Y Liangyou900were studied.The results showedthat there was less difference between the two hybrid rice varieties,but the difference of SPAD value,net photosynthetic rate and materialtransfer between treatments were significant.From heading stage to mature stage,the SPAD of treatment E decreased the most slowly underthe application of panicle fertilize,and maintain the highest value at maturity;the descend range of net photosynthetic rate in treatment Dwas minimun,but the highest value at E in maturity period.The output rate of dry matter of stem and sheath of Y Liangyou900was thelowest in the mature stage of treatment D,the weigh gains of dry matter of stem and sheath of Y Liangyou D were found in the maturestage of treatment,indicating that the stem and sheath material of the two varieties were not fully utilized.The yield of Y Liangyou6hadsignificantly positive correlation with the net photosynthetic rate and SPAD value;the yield of Y Liangyou900and net photosynthetic rateshowed a significant positive correlation,and significantly correlated with SPAD,the yield of two varieties were not significantly related tostem and sheath output rate and conversion rate.Compared with other treatments,panicle fertilizer were beneficial to delay leaf senescenceand increase net photosynthetic rate,to accumulate more photosynthetic products at booting6th stage.

关 键 词：穂肥 施用期 杂交稻 光合特性 干物质积累 

分 类 号：S143[农业科学—肥料学]