Effects of equal nitrogen organic fertilizer substitution of chemical fertilizer on photosynthetic characteristics and quality of waxy maize in oasis irrigation areas
Through field positioning experiments,the impact of the proportion of equal nitrogen amounts of or-ganic fertilizers replacing chemical fertilizers on the photosynthetic characteristics and nutritional quality of waxy corn was explored as toprovide a theoretical basis for the scientific application of organic fertilizer in waxy maize production in oasis irrigation area.In this study,'Jingkenuo 2000'was used as the tested variety.Under the condi-tion of 300 kg·hm-2 of pure nitrogen application,five treatments were set up,including full application of chemi-cal fertilizer(F1),25％replacement of chemical fertilizer by organic fertilizer(F2),50％replacement of chemical fertilizer by organic fertilizer(F3),75％replacement of chemical fertilizer by organic fertilizer(F4)and full appli-cation of organic fertilizer(F5),respectively.The photosynthetic characteristics of waxy maize at tasseling stage,grain nutritional quality at fresh ear stage and fresh ear yield were investigated.The results showed that:(1)repla-cing part of chemical fertilizer with organic fertilizer significantly improved the photosynthetic characteristics of waxy maize at tasseling stage.Compared with F1,the SPAD value of F2 and F3 treatments increased by 10.6％～14.3％,Tr increased by 11.7％～18.8％,Pn increased by 11.2％～17.1％,Gs increased by 62.2％～79.2％,and Ci de-creased by 22.7％～23.8％.(2)The fresh ear yield of waxy maize under F2 treatment was significantly higher than that of F1 by 10.4％.(3)Organic fertilizer replacing chemical fertilizer could significantly increase the soluble sug-ar content and crude fat content in fresh ears of waxy maize.Compared with F1,the soluble sugar content and crude fat content in F2 and F3 treatments increased by 22.9％～28.9％and 8.5％～11.4％,respectively.The crude pro-tein content of F2 treatment was 10.3％higher than that of F1.In addition,compared with F1,the contents of uma-mi amino acids and sweet amino acids in F2 were significantly increased by 15.7％～19.3％and 12.2％～17.4％,respectively.Among them,the content of aromatic amino acids in F2 was significantly increased by 13.0％com-pared with F1.In short,the replacement of 25％and 50％chemical fertilizers with organic fertilizers can signifi-cantly improve the nutritional quality of waxy corn while increasing the fresh ear yield of waxy corn and achieve high yield and high quality of waxy corn,which is a reasonable organic and inorganic fertilizer application method in this area.
waxy maizeorganic fertilizer substitution chemical fertilizerphotosynthetic characteristicqualityoasis irrigated area
万方数据
维普
