作物学报 ›› 2014, Vol. 40 ›› Issue (05): 942-949.doi: 10.3724/SP.J.1006.2014.00942
• 研究简报 • 上一篇
江文文,尹燕枰*,王振林*,李勇,杨卫兵,彭佃亮,杨东清,崔正勇,卢昆丽,李艳霞
JIANG Wen-Wen,YIN Yan-Ping*,WANG Zhen-Lin*,LI Yong,YANG Wei-Bing,PENG Dian-Liang,YANG Dong-Qing,CUI Zheng-Yong,LU Kun-Li,LI Yan-Xia
摘要:
为探明施用氮肥与减缓小麦花后高温伤害的关系并阐明其生理机制,于2011—2012年和2012—2013年连续两个生长季,选用小麦品种山农16和济麦22,在增温棚中进行花后11~15 d的高温胁迫处理,比较了氮肥全作基肥(T0)、1/2基肥+1/2拔节期追肥(T1)、1/2基肥+1/2孕穗期追肥(T2) 3种施氮方案下的产量、产量构成因素、旗叶光合特性及部分酶的活性。在高温胁迫下,T2方案较T0和T1显著增加籽粒千粒重和产量,提高旗叶谷氨酰胺合成酶(GS)活性,增加旗叶气孔导度和光合速率,提高旗叶过氧化氢酶(CAT)和过氧化物酶(POD)活性,促进花前营养器官干物质向籽粒转运,增加开花后积累的干物质对籽粒的贡献率。两个品种结果基本一致。综合两年结果可以看出,T2处理显著优于T0和T1处理,T2处理能显著缓解高温胁迫的伤害,提高籽粒产量。
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