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(常规水作 )净光合速率 (Pn)和蒸腾速率 (Tr)的日变化呈单峰曲线 ;旱作水稻在雨后高土壤湿度时 (覆膜旱作 )和 (露地旱作 )的 Pn 为单峰曲线 ,Tr 为单峰曲线 , 为双峰曲线 ,PFD为光合作用主要限制因子 ;在持续干旱低土壤含水量时 , 和 的 Pn 和 Tr均为双峰曲线 ,气孔导度 (Gs)不同土壤含水量时均为单峰曲线 ,Tr日均值不同土壤含水量时均为 > > ;Gs 日均值均为 < 。 WU E(Pn/Tr)均为 > > ,旱作水稻水分利用率较常规水作高。不同土壤含水量下 , 与 或 之间的日平均 Pn、叶绿素含量 (Ch1)和叶片呼吸强度差异不显著 ,根系呼吸强度 > > ,差异极显著
(Pn) and transpiration rate (Tr) showed a single-peak curve. The Pn of paddy rice under high soil moisture after rainfall (film mulched with dry film) and open ground dry mulching Single peak curve, Tr single curve, bimodal curve, PFD is the main limiting factor of photosynthesis; Pn and Tr are both bimodal curve and stomatal conductance (Gs) Soil moisture content are unimodal curves, Tr average daily average soil moisture content were>; Gs daily mean <. WU E (Pn / Tr) were all>>, and the water use efficiency of paddy rice was higher than conventional water. The daily average Pn, chlorophyll content (Ch1) and leaf respiration intensity were not significantly different under different soil moisture contents, with or without respiration, and root respiration intensity>>, significantly different