学术
摘 要:
利用人工模拟降雨装置，设置平作和垄作两种种植方式，以平作为对照组，研究了玉米在垄沟集雨下光合特性和水分利用效率的变化。结果表明，在230mm、340mm的降雨量下，沟垄集雨种植玉米的光合速率显著高于对照组，分别提高了41．1％和10．5％，在440mm的降雨量下，两者的差异不显著；在3个雨量下，沟垄集雨种植玉米的叶片瞬时水分利用效率比对照组均有提高，分别提高了20．5％、18．9％和10．7％；沟垄集雨种植玉米和对照组的光合速率日变化均呈“单蜂型”曲线，对照组水分利用效率在230mm、340mm降雨量下呈“单蜂型”曲线，在440mm降雨量下呈现逐渐下降的趋势，沟垄集雨种植的玉米水分利用效率均呈“单蜂型”曲线。[著者文摘]
文章出处:
《干旱地区农业研究》-2008年26卷1期,101 -81-85,101页
栏目信息:
分 类 号:
文献标识码:
A
文章编号:
1000-7601（2008）01-0081-05
Effect of Water micro-collecting planting on corn （Zea mays L. ） photosynthesis rate and water use efficiency under simulated rainfall conditions
HAN Juan, JIA Zhi-kuan , REN Xiao-long, HAN Qing-fang, DING Rui-xia （ College ofAgronamy, Northwest A ＆ F University, Yangling, Shaanxi 712100, China）
Abstract:
Photosynthesis characteristics and water use efficiency（WUE） were studied in different stimulated rainfall. The results showed that the photosynthesis rate （Pn） of micro-collecting planting treatments was higher in comparing with the control condition under 230 mm and 340 mm rainfall, increased by 41.1% and 10.5 % separately. But there was no significant difference between micro-collecting planting and the control condition under 440 mm. And the WUE of micro-collecting planting treatments in comparing with the control condition was higher under 230 mm,340 mm and 440 mm rainfall, increased by 20.5 %, 18.9 % and 10.7 % separately. The results also showed that the diurnal change curve of Pn was a single peak charact in micro-collecting planting treatments and the control condition. The diurnal change of WUE was a single peak curve under 230 mm and 340 mm rainfall, but was a downward tendency under 440 mm in the control condition. In micro-collecting planting, the diurnal change of WUE was a single peak curve.[著者文摘]
Key words:
water micro-collecting planting; photosynthesis rate; water use efficiency; summer corn （Zea mays L. ）
基金资助:
“十一五”国家科技支撵计划课题（2006BAD29B03）
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