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ID:9054044
大小:1.02 MB
页数:6页
时间:2018-04-16
《水肥状况对幼龄葡萄光合特性的影响研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、10中国农村水利水电·2015年第7期文章编号:1007-2284(2015)07-0010-06水肥状况对幼龄葡萄光合特性的影响研究龚萍,刘洪光,何新林(石河子大学水利建筑工程学院,新疆石河子832000)摘要:不同水肥条件下,土壤中水分和养分含量各不相同,作物的产量和品质也会因此受到影响,而作物的产量与品质离不开叶片光合作用。为了探究水肥耦合对葡萄光合特性的影响,对不同水肥配比条件下的葡萄植株的光合作用进行观测和分析,结果表明:在葡萄的各生育阶段,光合速率与蒸腾速率均呈现先增加后降低的趋势,最大值都出现在果实膨大期。在9个不同水肥处理中,W2N1处理的光合速率值最大;W2N1、W2
2、N1、W3N1处理的蒸腾速率值均高于其他处理。光合速率的日变化呈现整体先升高再降低的趋势,最大值出现在10-12时之间,最小值出现在中午14时;根据光合速率和蒸腾速率在果实膨大期的日变化,拟合出果实膨大期光合速率和蒸腾速率与水肥的定量关系,从蒸腾速率的日变化中发现总体上W1N1、W1N2、W1N3处理的葡萄蒸腾速率较高,水分消耗大;W2N1、W2N2、W2N3处理的葡萄蒸腾速率较低,水分消耗小,有一定的节水作用。关键词:滴灌;葡萄;光合作用;水肥耦合中图分类号:S275.6文献标识码:ATheEffectofWaterandFertilizerCouplingonPhotosynthe
3、ticCharacteristicsofGrapesGONGPing,LIUHong-guang,HEXin-lin(InstituteofWaterConservancyConstructionEngineering,ShiheziUniversity,Shihezi832000,Xinjiang,China)Abstract:Underdifferentwaterandfertilizerconditions,soilmoistureandnutrientcontentvaries,cropyieldandqualitywillbeaf-fected,andtheyieldandq
4、ualityofcropsareinseparablefromleafphotosynthesis.Toexploretheeffectoffertilizeronphotosynthet-iccharacteristics,thispaperexploresdifferentratiosofwaterundertheconditionofgrapeplantphotosynthesisofobservationanda-nalysis.Theresultsshowthat:ateachgrowthstageofgrapes,photosyntheticrateandtranspira
5、tionrateshowsadecreasingtrendafterthefirstincrease,themaximumappearsinfruitenlargement.Inninedifferentwaterandfertilizertreatments,photosyntheticrateofW2N1achievesmaximumvalue.TranspirationratevaluesofW2N1,W2N1,W3N1treatmentsarehigherthanothertreat-ments.Thediurnalvariationofthephotosyntheticrat
6、eshowsatrendofoverallincreasefirst,decreasethen,themaximumappearsbetween10to12points,theminimumvaluein14atnoon.Accordingtothephotosyntheticrateandtranspirationrateinthediurnalvariationofthefruitenlargementstage,thequantitativerelationshipofphotosyntheticrateandtranspirationratefitinwithwaterandf
7、ertilizeratfruitenlargementperiod.Fromthediurnalvariationoftranspirationrate,itisfoundthatgrapetranspirationrateofW1N1,W1N2,W1N3treatmentishigher,morewaterconsumption.ThegrapetranspirationrateofW2N1,W2N2,W2N3treatmentislower
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