Experimental Study On Water-saving Irrigation For Courtyard Cash Crop Of Ecological Immigrant Village In Hongsipu Zone

The study of the water-saving irrigation system and planting mode of courtyard cash crops is carried on,based on the problems of water resources shortage,the contradiction between supply and demand and lower economic benefit of courtyard in Hongsipu zone in the arid area of central Ningxia,which provides theoretical basis and technical support for courtyard economic development,increasing income of farmers and efficient water-saving irrigation in the arid area of central Ningxia.The main results are as follows:1.Based on the orthogonal experiment,the yield,growth indexes and physiological indexes of lycium under drip irrigation are analyzed by using irrigation quota,pure nitrogen and pure phosphorus as influence factors.It shows that Irrigation quota,pure nitrogen and pure phosphorus have significant effects on lyceum dried fruit yield,the order of effect of each factor on lyceum dried fruit yield is that irrigation quota>pure phosphorus>pure nitrogen;lyceum dried fruit yield advances with the increase of irrigation quota and pure phosphorus,and first increases then decreases with the increase of pure nitrogen;the optimal combination of water and fertilizer for lycium is lirrigation quota with 13.5 m3·667m-2,pure nitrogen with 52 kg·667m-2 and pure phosphorus with 39 kg ·667 m-2 in Hongsipu zone.2.Based on the orthogonal experiment,the yield,growth indexes and physiological indexes of lycium ruthenicum murr under drip irrigatio are analyzed by using irrigation quota,pure nitrogen and pure phosphorus as influence factors.It shows that Irrigation quota,pure nitrogen and pure phosphorus have significant effects on lyceum dried fruit yield,the order of effect of each factor on lycium ruthenicum murr yield is irrigation quota>pure nitrogen>pure phosphorus;lyceum dried fruit yield advances with the increase of irrigation quota and pure phosphorus,and first increases then decreases with the increase of pure nitrogen;however,pure phosphorus makes no significant influence on length of fresh treetop,diameter of fresh treetop and hundred-grain weight;the optimal combination of water and fertilizer for lycium ruthenicum murr is lirrigation quota with 13.5 m3·667m-2,pure nitrogen with 52 kg·667m2,and pure phosphorus with 26 kg.667 m-2 in Hongsipu zone.3.Based on the single factor contrast experiment,the water-saving irrigation system of different crops under mulched drip irrigation are studied.And the growth indexes,physiological indexes,yield and water use efficiency of different crops are analyzed,it shows that under the conditions of drought and water shortage,the more appropriate irrigation system is that:the irrigation quota of pepper and tomato is 18 m3·667m-2,irrigation frequency is 14,and irrigation quota before sowing is 15 m3·667m-2;the irrigation quota of sweet potato is 12 m3·667m-2,irrigation frequency is 15,and irrigation quota before sowing is 17 m 3·667m-2;the irrigation quota of potato is 12 M3·667m-2,irrigation frequency is 12,and irrigation quota before sowing is 16 m3·667m-2;the irrigation quota of corn is 30 m3·667m-2,irrigation frequency is 6,and irrigation quota before sowing is 33 m3·667m-2.4.According to the survey of the cultivation of the courtyard cash crops in ecological immigration village of Hongsipu zone in 2016,the planting structure model based on local actual situation is established by taking the economic benefit and water-saving benefit as targets.The multi-objective function is converted into single objective fnction in the way of fuzzy compromise programming The importance of different objective functions is determined with fuzzy preference method.And it is sovled with matlab.The decision maker could choose different schemes according to different hydrological years.