Improvement in winter wheat productivity through regulating PSⅡ photochemistry,photosynthesis and chlorophyll fluorescence under deficit irrigation conditions  

作　　者：Shahzad ALI XU Yue-yue MA Xiang-cheng JIA Qian-min JIA Zhi-kuan 

机构地区：[1]College of Pastoral Agriculture Science and Technology,Lanzhou University,Lanzhou 730000,P.R.China [2]Institute of Water Saving Agriculture in Arid Areas,Yangling 712100,P.R.China

出　　处：《Journal of Integrative Agriculture》2022年第3期654-665,共12页农业科学学报（英文版）

基　　金：supported by the National Key Technologies R&D Program of China (2012BAD09B03);the China Postdoctoral Science Foundation Project Funding (2018M642614);the Special Fund for Agro-scientific Research, China (201303104);the Natural Science Foundation of Shandong Province, China (ZR2017ZB0422);the “Taishan Scholar” Project of Shandong Province, China。

摘　　要：Deficit irrigation is critical to global food production,particularly in arid and semi-arid regions with low precipitation.Given water shortage has threatened agricultural sustainability under the dry-land farming system in China,there is an urgent need to develop effective water-saving technologies.We carried out a field study under two cultivation techniques:(1) the ridge and furrow cultivation model(R);and(2) the conventional flat farming model(F),and three simulated precipitation levels(1,275 mm;2,200 mm;3,125 mm) with two deficit irrigation levels(150 and 75 mm).We demonstrated that under the ridge furrow(R) model,rainfall harvesting planting under 150 mm deficit irrigation combined with 200 mm simulated precipitation can considerably increase net photosynthesis rate(P_(n)),quantum yield of PSII(ΦPSⅡ),electron transport rate(ETR),performance index of photosynthetic PSII(F_(v)/F_(m)′),and transformation energy potential of PSII(F_(v)/F_(o)).In addition,during the jointing,anthesis and grain-filling stages,the grain and biomass yield in the R model are 18.9 and 11.1% higher than those in the flat cultivation model,respectively,primarily due to improved soil water contents.The winter wheat fluorescence parameters were significantly positively associated with the photosynthesis,biomass and wheat production.The result suggests that the R cultivation model with irrigation of 150 mm and simulated precipitation of 200 mm is an effective planting method for enhancing P_(n),biomass,wheat production,and chlorophyll fluorescence parameters in dry-land farming areas.

关 键 词：chlorophyll fluorescence deficit irrigation PHOTOSYNTHESIS production planting models soil moisture content 

分 类 号：S512.11[农业科学—作物学]