关键词: font-family:宋体, ">辣椒；双膜覆盖；生长；产量

Abstract: To evaluate and discuss the applicability and application effect of ridging and double plastic film mulching in Hexi oasis irrigation district greenhouse,three treatments were designed,single layer plastic film mulching on the ridge,single layer plastic film mulching on the ridge bottom,and double-layer plastic film mulching,taking no film mulching as the control,the furrow irrigation water and fertilizer supply mode was adopted,and effects of different plastic film mulching methods on plant growth and yield of facility cultivation capsicum were studied.The results showed that the plant height,stem diameter,main root length,dry and fresh weight of the aboveground and underground part and yield of the ridge surface plastic film mulching treatments were significantly higher than those of the control during the whole growth period,and the root-shoot ratio was significantly lower than that of the control during the whole growth period; At the maturity stage,the plant height of the double-layer plastic film mulching treatment was 9.46% and 5.82% significantly higher than that of the single layer plastic film mulching on the ridge and single layer plastic film mulching on the ridge bottom,the stem diameter was 9.13% and 11.82%,the leaf width was 27.57% and 34.47%,the chlorophyll content was 7.74% and 6.91%,the fresh weight of the underground part was 1.30% and 1.53%,the main root length was 4.13% and 7.26%,the dry weight of the aboveground part was 0.83% and 22.67%,and the dry weight of the underground part was 13.96% and 16.23%.The yield of capsicum was significantly higher than that of single layer plastic film mulching on the ridge,single layer plastic film mulching on the ridge bottom and the control by 14.58%,12.75% and 28.18%,and there was no significant difference in capsicum yield between the two single layer plastic film mulching methods.By comprehensive analysis,the facility ridging and double plastic film mulching is a kind of plastic film mulching method which can promote the growth of capsicum plants and increase yield,and it is suitable to extend and apply in high-yield cultivation of facility capsicum in Hexi oasis irrigation district.

Key words: Capsicum, Double plastic mulching, Growth, Yield