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Agricultural University of Hebei (2021)

Effect of Trace Quantity Irrigation on Cotton Field Spatio-temporal Water Supply and Cotton Growth and Development

陈立宇

Titre : Effect of Trace Quantity Irrigation on Cotton Field Spatio-temporal Water Supply and Cotton Growth and Development

Auteur : 陈立宇

Grade : Doctoral Dissertation 2021

Université : Agricultural University of Hebei

Résumé partiel
The Alxa League in the west of Inner Mongolia has a vast land area,rich light and heat resources,suitable for cotton growth,and is plans to use as a national reserve cotton area.However,there is little precipitation,a lot of wind and sand,strong evapotranspiration in farmland,shortage of water resources and inefficient use of crop water,which are the main problems that restrict cotton production in this area.Exploring the effective way of water supply in cotton fields and clarifying the relationship mechanism between cotton field water consumption and cotton production is a scientific problem that needs to be solved to achieve efficient water use and expand agricultural land resources,and it is also a theoretical basis for supporting applicable technological innovation.In this study,the cotton variety ’China Cotton Institute 92’ was used as the test material.In 2016-2018,Ejina Banner,Alxa League,western Inner Mongolia.the cotton experimental demonstration base of the Inner Mongolia Academy of Agriculture and Animal Husbandry Sciences,set up two irrigation methods:drip irrigation under film and trace irrigation In the field test of locating cracked areas.In the experiment,drip irrigation under the film,the irrigation volume of 360 mm was used as the control(CK),and the trace irrigation settings were T1,T2,T3,T4,T5(the buried depth was 30 cm,and the irrigation volume was 360,330,300,270 and 240 mm,respectively)),T6,T7,T8,T9,T10(buried depth 40 cm,water volume the same as above),T11,T12,T13,T14,T15(buried depth 50 cm,water volume the same as above),etc.16 treatments.Through analysis and comparison of the temporal and spatial dynamics of soil moisture between different treatments,the effect of cotton field water supply on water consumption,cotton root biomass accumulation and physiological response,above-ground morphology,photosynthetic characteristics,leaf transcriptome profile expression,and cotton yield,quality,and water use effects,Reveal the influence mechanism of trace irrigation on cotton field water supply and cotton growth,and provide theoretical basis and technical support for the technical innovation of high-efficiency utilization of cotton field water using trace irrigation.

Mots clés : Trace quantity irrigation ;Drip irrigation under the film ;Cotton;"Water-root-crown" anastomosis ;Effective water supply ;Yield;Water Use Efficiency ;

Présentation (CNKI)

Page publiée le 16 février 2022