农业资源与环境学报2024，Vol.41Issue(6)：1285-1294,10.DOI:10.13254/j.jare.2024.0429
灌水量和矿化度对膜下滴灌棉花光合特性与产量的影响
Effects of irrigation amount and salinity on photosynthetic characteristics and yield of cotton under drip irrigation
摘要
Abstract
In order to explore the response mechanism of photosynthetic characteristics and yield of cotton to irrigation salinity and irrigation amount under mulched drip irrigation.The field plot experiment was carried out with"Xinluzao 48"as the research object in 2023.Two irrigation amounts of 4 500 m3·hm-2(W1)and 3 600 m3·hm-2(W2)and three irrigation salinities of 1(S1),3 g·L-1(S2)and 5 g·L-1(S3)were set to analyze their effects on photosynthetic characteristics and yield of cotton.The results showed that under adequate irrigation,appropriate brackish water irrigation can increase leaf area index(LAI),chlorophyll content(SPAD),net photosynthetic rate(Pn),transpiration rate(Tr),stomatal conductance(Gs),light use efficiency(LUE)and stomatal limitation values(Ls),while reducing intercellular CO2 concentration(Ci).Inadequate irrigation or high salinity will increase Ci,decrease LAI,SPAD,Pn,Tr,Gs,LUE and Ls.Compared with S2W1 treatment,S2W2 treatment increased the leaf water use efficiency by 3.19%and 14.79%at seedling and flowering and boll stage.The seed cotton yield of S2W1(4 957 kg·hm-2)was significantly higher than that of S1W1(4 887 kg·hm-2),and S3W2(4 173 kg·hm-2)with increases of 1.43%and 18.79%.The results of path analysis showed that LAI,Pn and Ls at flowering and boll stage had the greatest direct contribution to yield,and Gs had the greatest indirect contribution to yield mainly through LAI,Pn LUE and Ls.The leaf area index and chlorophyll of cotton treated with S2W1 were the largest,which promoted the photosynthesis and light energy utilization rate of leaves to maintain the highest,ultimately increasing the yield of cotton.关键词
棉花/膜下滴灌/灌水矿化度/灌水量/光合特性Key words
cotton/mulched drip irrigation/mineralization of irrigation water/irrigation water amount/photosynthesis分类
农业科技引用本文复制引用
秦小婉,王振华,雷雨,张金珠,李文昊,马占利..灌水量和矿化度对膜下滴灌棉花光合特性与产量的影响[J].农业资源与环境学报,2024,41(6):1285-1294,10.基金项目
国家重点研发计划项目(2021YFD1900802) （2021YFD1900802）
兵团重点领域科技攻关项目(2022AB011) （2022AB011）
国家自然科学基金项目(52169012,52369011) （52169012,52369011）
石河子大学创新发展专项(CXFZ202201)National Key Research and Development Program of China(2021YFD1900802) （CXFZ202201）
XPCC Key Science and Technology Plan in Key Areas(2022AB011) （2022AB011）
National Natural Science Foundation of China(52169012,52369011) （52169012,52369011）
Innovation and Development Project of Shihezi University(CXFZ202201) （CXFZ202201）
