Effects Of Micro-irrigation With Domestic Reclaimed Water On The Growth,yield And Quality Of Alfalfa And Pepper

In view of the applicability of reclaimed water irrigation for alfalfa and pepper in Zhongwei City of Ningxia,based on the reclaimed water irrigation demonstration base of Wenchang Town,Shapotou District,Ningxia Water Investment Zhongwei Water Co.,Ltd.,pot experiment,randomized block experiment and orthogonal experiment were used to systematically study the effects of different irrigation water quality,irrigation quota,topdressing amount and new water-saving technologies of reclaimed water on the growth,pHotosynthesis,yield,quality and applicability of alfalfa and pepper,so as to provide theoretical basis and technical support for the efficient and water-saving irrigation of alfalfa and pepper with reclaimed water in Ningxia.The main research results are as follows:(1)The effects of different irrigation quotas of reclaimed water on growth,yield and pHotosynthesis of alfalfa were studied by pot experiment.The results showed that under the same irrigation quota,compared with tap water irrigation,the plant height,stem diameter,net pHotosynthetic rate and yield of alfalfa under reclaimed water irrigation increased by 2.14%,2%,10.47%and 7.05%,respectively.With the increase of reclaimed water irrigation quota,the plant height,stem diameter,net pHotosynthetic rate and yield of alfalfa increased first and then decreased.(2)Using a random neighborhood test,the effects of different irrigation quota and irrigation technology of regenerated water on the growth,production,quality and applicability of secondary pasta.The results show that the ground drip irrigation and trace irrigation are better than micro-injection and micro-irrigation,and the growth of purple is high,high yield,excellent quality.As the irrigation quota increases,the parameters of the purple gratis,the stem,yield,and pHotosynthetic action are increased.As the irrigation quota increases,the heavy metal lead,chromium,cadmium,and arsenic content of purple,among which micro-metal lead,chromium,cadmium,and arsenic content are the largest,and the microspray irrigation is minimized,but satisfied "feed" Health Standards.(3)The orthogonal test is used to reveal the effects of regenerative water different irrigation water quality,irrigation quota and irrigation technology on the production,quality,nutrient and applicability of secondary pasta.The results showed that the primary factors affecting the production of purple alfalfa,quality,nutrient(pHospHorus,potassium)are:Irrigation quota>Irrigation technology>Irrigation water quality.Under trial conditions,the optimal combination of regenerated water irrigation purple glyfast factors is the irrigation water quality is regenerated,and the irrigation method is underground drip irrigation.The irrigation quota is 3360m3/hm2.The number of irrigation is 14 times,the yield of purple is the best,quality and nutrient content,Heavy metal content meets the requirements of "Feed Hygiene Standards".(4)Using two factors three-level random neighborhood test,it reveals the effects of regenerative water different irrigation water quality and irrigation quota and topstry on pepper growth,production,pHotosynthesis,quality and applicability.The results show that as the irrigation quota increases,the pepper strain is high,the stems and yield increases;with the increase in the amount of topdress,the high pepper strain increases,and the stems and yield of pepper are reduced.Different irrigation water quality pairs of pepper strains The effects of high,stems and yield are:regenerated water>mixed water>tap water;the nitrate content in the pepper fruit decreases as the irrigation quota increases,increases with the increase of the topstuture;C,soluble protein,capsaicin and capsaic substances have decreased as irrigation quota and the amount of topstressure increase.(5)The orthogonal test reveals the effects of different irrigation water quality,irrigation quota and the amount of pepper growth,yield,quality and applicability.Studies have shown that the primary sequence affecting high,stem,yield,and nitrate three factors of pepper is:Irrigation quota>TropHy weight>Irrigation water quality.The primary sequence of three factors affecting the quality of pepper quality(vitamin C,soluble sugar,soluble protein,and capsaic substances)is:TropHy>Irrigation Water quality>Irrigation quota.Comprehensive pepper growth,production,quality and heavy metals content indicators,three-factor optimal combination scheme is the irrigation water quality is regenerated,irrigation quota is 2820m3/hm2,and when the amount of topstuture is 900kg/hm2,the growth status of pepper is good,high yield,quality Excellent and the nitrate and heavy metal content in the fruits of the pepper can meet the provisions of "Safety requirements for the safety of agricultural products".