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ID:28576267
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页数:11页
时间:2018-12-11
《不同氮水平处理下滴灌棉花气孔导度与土层(10 cm)田间持水率之间的响应特征》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、不同氮水平处理下滴灌棉花气孔导度与土层(10cm)田间持水率之间的响应特征守望先锋代练http://www.owgzs.com/dlong 摘要:为了揭示滴灌棉花节水节肥效果,为滴灌棉花节水节肥提供技术参数和理论依据,以新陆早42号为试验材料,采用滴灌盆栽试验,研究滴灌棉花气孔导度与土层(10cm)的田间持水率之间的响应关系,获得蕾期和花铃期不同施N水平条件下其相关性和模型。结果表明,在蕾期不同处理纯N分别为2,4,6g?盆-1的条件下,气孔导度与土层10cm的田间持水率之间呈负相关关系,相关性系数(r)分别为-0.859,-0.863,-0.934,T检验显
2、著水平P为0.062,0.059,0.020;6g?盆-1处理的拟合模型为线性函数,模型拟合决定系数(R2)为0.872,F检验显著水平P为0.020,达到显著水平;花铃期,气孔导度与土层10cm的田间持水率之间呈正相关关系,相关性系数(r)分别为0.918,0.750,0.867,T检验显著水平P为0.028,0.144,0.057;2g?盆-1处理的拟合模型为指数函数,模型拟合决定系数(R2)为0.891,F检验显著水平P为0.016,达到显著水平。该函数模型很好地描述了滴灌棉花气孔导度与土层10cm的田间持水率之间的相关关系,为内陆干旱区绿洲农业滴灌棉花耗
3、水量的估算提供了新的计算方法和理论依据。 ResponseCharacteristicsbetweenDripIrrigationCottonStomatalConductanceandFieldCapacityof10cmSoilLayerunderDifferentConditionsofNitrogenFertilizers ZHANGJian-xin1,HEJiang-yong1,SHIRong-yuan2 (1.InstituteofIrrigationandWaterConservancyandSoilandFertilizerofXi
4、njiangAcademyofAgriculturalandReclamationSciences,ShiheziCity,Xinjiang832000,China;2.PaotaiSoilImprovementTestStationofEighthDivision,XinjiangProductionandConstructionCorps,ShiheziCity,Xinjiang832066,China) Abstract:Torevealthewater-savingandfertilizer-savingeffectofthedripirrigatio
5、ncottonandprovidetechnicalparametersandtheoreticalbasis,theNo.42XinluzaoCottonwastakenasexperimentalmaterial,theexperimentalmethodofdripirrigationpottingwasadoptedtostudytheresponserelationshipbetweenthedripirrigationcotton’sstomatalconductanceandthefieldcapacity10cmbeneaththeground,
6、acquiringthecorrelationandmodeloftheblossomingstageandthebudstageunderdifferentnitrogenfertilizerlevels.Theresultsshowedthatduringthebudstageofcotton,therewasnegativecorrelationbetweenstomatalconductanceandfieldcapacity10cmbeneaththegroundunderthenitrogenfertilizerlevelof2,4,6gperpot
7、(N),andtherelativecoefficients(r)were-0.859,-0.863,-0.934,thesignificantlevelPofTtestwere0.062,0.059,0.020;thefittingmodelof6gperpot(N)waslinearfunction,themodelfittingdeterminationcoefficients(R2)was0.891,andthesignificantlevelPofFtestwas0.016,reachingthesignificantlevel.Therefore,t
8、hefunctionmo
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