Effects of different colors of film mulching and additional bio-organic fer-tilizer application on ground temperature and weed growth and melon yield
This study aimed to explore different colors of mulch and bio-organic fertilizer application on melon yield.A filed experiment comprising of three different colors of mulch[black film(B),black and white film(W),silver on top and black on bottom(S)]and three bio-organic fertilizer application rates[1800 kg·hm-2(H),1200 kg·hm-2(M),600 kg·hm-2(L)]to study soil thermal effect,weed growth and melon yield.The results showed that three different colors of mulch films could increase soil temperature throughout the whole fertility period of melon,and had the dual effect of increasing temperature at low temperature stage and cooling at high temperature stage,and the effect of increasing temperature was S>W>B,and the effect of cooling was S>B>W,and the average soil temperature of 0-20 cm soil layer from seedling stage to ripening stage of melon showed that S film increased temperature by 1.11-2.14℃ and cooling 1.94-3.09℃,B film increased temperature 0.72-1.77℃ and cooling 1.44-2.81℃,W film increased temperature 0.68-1.90℃ and cooling 0.56-2.28℃.The soil temperature results of different fertility periods showed that the cooling and heat preservation effects of the three different colors of mulch films were mainly manifested in the early stage of mel-on fertility,and the warming effect was early>middle>late in the whole fertility period,and the heat preservation effect was early>late>middle.The effectiveness of weed control was significantly higher than that of CK,and the effective-ness of weed plant control and fresh mass control were 6.5％,92.2％ and 7.0％,131.1％ higher for S and W mulches,re-spectively,than that of B and W mulches,with significant differences.In terms of yield,S and B film mulching signifi-cantly increased 20.5％ and 11.2％,respectively,compared to CK.Under different fertilization rates of organic fertilizers,the medium fertilization rate under the S-film mulching condition significantly increased melon yield compared with the other treatments(except the BH treatment)and CK.Under the irrigated conditions of the Hexi Oasis,taking into account the cultivation requirements of mulching and weed control,and integrating the factors of soil temperature,melon fruit traits and yield,the preferred mulch color was upper silver and lower black two-color film,and the appropriate fertilizer application rate of bio-organic fertilizer was 1200 kg·hm-2.
万方数据
维普
