For optimal irrigation system of brackish water drip irrigation,respectively with brackish water (salinity 2.7g/L),water (salinity 0.18g/L),mixed water (brackish water and water mixed by 1:1,salinity 1.6g/L) three kinds of water quality,analysis the effect of 5 kinds of irrigation on the growth and yield of pepper.The plant height, photosynthesis,yield,fruit quality were measured.The results show that long-term use of brackish water irrigation,will make the plant growing weaker,and the production (3069.8kg/667m2) lower than other treatment.The use of water irrigation yield can reach to 4147.9kg/667m2 ,the plant water use efficiency was effectively improved under the same irrigation amount. This approach not only reduce the quality, but also would increase the farmers in the cost.Compared with the brackish water,mixing water’s yield ( 3603.2kg/667m2 ) increased by 14.8%, and the organic acid content decreased.While the content of total soluble sugar was higher than water irrigation.In general, the degree of mineralization of 1.6g/L mixed brackish water and water irrigation mode can get high yield, good quality.So it can be planting in the brackish water area.
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