中国农业科学2011，Vol.44Issue(15)：3108-3117,10.
轮耕对宁南旱区冬小麦花后旗叶光合性能及产量的影响
Effects of Rotational Tillage on Flag Leaf Photosynthetic Characteristics and Yield After Anthesis of Winter Wheat in Arid Areas of Southern Ningxia
摘要
Abstract
[Objective] The objective of the experiment is to seek the effects of no-tillage (NT)/Subsoiling (ST) rotational tillage system every other year on photosynthetic capacity and yield after anthesis of winter wheat. [ Method] Based on three tillage treatments of NT/ST/NT, ST/NT/ST and conventional tillage (CT) in arid areas of southern Ningxia, it was investigated by measuring soil water, flag leaf area, chlorophyll relative content, photosynthetic characteristics, chlorophyll fluorescence parameters and yield under different soil tillage treatments after anthesis of wheat in 2010. [ Result] Compared with conventional tillage (CK), the soil water storage in 0-200 cm soil layers of NT/ST/NT and ST/NT/ST was significantly increased by an average of 15.24% and 23.45% at flowering stage and filling stage of wheat, their flag leaf area and chlorophyll relative content were increased by an average of 12.78%, 8.89% and 25.20%, 11.19% (P<0.05), respectively; their flag leaf daily average photosynthesis rate (Pn) was increased by an average of 1.55 and 1.68 μmol·m-2-s-1 (P<0.05), their flag leaf daily average transpiration rate (Tr) was increased by an average of 0.44 and 0.58 mmol·m-2·s-1(P<0.05), but, their flag leaf daily average water use efficiency (WUE) showed no obvious difference. At filling stage, two rotational tillage treatments had a higher level of maximal photochemical efficiency of PS II in the darkness (0.52), actual photochemical efficiency of PS II in the light (0.40) and photosynthetic electron transport rate (92.67). Compared with conventional tillage, the different rotational tillage system achieved wheat grain yield increment of 6.88% and 11.98% (P<0.05). [Conclusion] The different rotational tillage systems all showed better soil water conservation ability and high photosynthetic capacity after anthesis of wheat, significantly increased wheat yield under condition of drought and water shortage. So, the different rotational tillage system is a more suitable soil tillage system in arid areas of southern Ningxia.关键词
宁南旱区/轮耕模式/冬小麦/光合特性/叶绿素荧光参数/产量Key words
arid areas of southern Ningxia/ rotational tillage system/ winter wheat/ photosynthetic characteristics/ chlorophyll fluorescence parameters/ yield引用本文复制引用
侯贤清,贾志宽,韩清芳,王维,丁瑞霞,聂俊峰,李永平..轮耕对宁南旱区冬小麦花后旗叶光合性能及产量的影响[J].中国农业科学,2011,44(15):3108-3117,10.基金项目
"十一五"国家科技支撑计划课题(2006BAD29B03,2007BAD88B10) （2006BAD29B03,2007BAD88B10）
