Effects of different colors of film mulching and additional application of bio-organic fertilizer on the growth,light energy use efficiency and fruit quality of melons

LIU Bin; KOU Yanyan; CHEN Liang; YANG Shimei; XIE Jianming

doi:10.16861/j.cnki.zggc.2024.0208

Abstract：In order to investigate the regulatory effects of different colors of mulch and additional application of bio-or-ganic fertilizer on the growth,development and light energy use efficiency of melons,the effects of 3 different colors of mulch[black mulch(B),black and white mulch(W),and top silver and bottom black mulch(S)]and 3 kinds of bio-organic fertilizers[1800 kg·hm-2(H),1200 kg·hm-2(M),and 600 kg·hm-2(L)]on the growth,development,yield and light energy use efficiency(PUE)were investigated under field conditions. The results showed that under different colors of film treatment,the average biological yield,economic yield,and PUE of melons treated with S film were significantly increased by 23.35％,20.50％,and 23.61％,respectively,compared to those treated with transparent film without bio-or-ganic fertilizer(CK),and were significantly higher than that of W film and B film. The improvement of leaf area index and specific leaf mass showed S film>W film>B film in the early stage,and it was S film>B film>W film in the late stage. The soluble sugar content and vitamin C of melon fruits covered with S film were significantly increased by 13.52％ and 26.21％,respectively,while the content of titratable acid was significantly reduced by 17.07％,compared to that of CK. Under different treatment combinations,SM and SH increased the vine length,specific leaf mass,and leaf area index throughout the entire growth period of melon,as well as the stem thickness during fruit enlargement and maturity. They al-so increased the soluble sugar and vitamin C content of melon fruits,while reducing the titratable acid content. In terms of yield and light energy use efficiency,SM and SH treatment significantly increased biological yield,economic yield and PUE by 24.54％,22.98％,23.61％and 24.95％,21.74％and 25.00％,respectively,compared with CK. In conclusion,it is recommended that the color of the ground film for melon cultivation in the desert oasis irrigation area of the Hexi Corri-dor is upper silver and lower black bi-color film,and the fertilizer application rate of additional bio-organic fertilizer is 1200 kg·hm-2.