Fertilizer reduction and efficiency enhancement of optimized fertilization combined with alginate organic water-soluble fertilizer on greenhouse cucumber
Using cucumber as the experimental material and using field experimental research methods,three treatments are set up:conventional fertilization(FP),optimized fertilization(OPT),and alginate organic water-soluble fertilizer(OPT-1).The effects of optimized fertilization combined with alginate organic water-soluble fertilizer on greenhouse cucumber yield,quality,nutrient absorption,soil nitrate nitrogen residue,and economic benefits are studied.The results show that compared with FP and optimized fertilization treatments,optimized fertilization combined with application of alginate treatment saved 17.2％-61.6％,18.4％-69.0％,16.9％-58.6％of N,P2O5,K2O,respectively,and increased fruit yield by 17.2％-20.9％;increased fruit soluble sugar content by 31.5％-37.5％,VC content by 3.3％-6.7％,and soluble protein content by 8.3％-12.7％,and reduced nitrate content by 8.0％-9.1％,respectively;Increased straw and fruit nitrogen uptake by 12.5％-25.4％and 4.6％-5.4％,respectively;Decreased nitrate nitrogen content by 32.3％-43.8％,37.3％-65.0％in 0-20 cm and 20-40 cm soil layers,respectively;Improved economic benefits by 15.3％-22.1％.
greenhouse cucumberalginateoptimize fertilizationweight loss and increased effectiveness
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