Effects of organic fertilizer and intercropping on soil microbial characteristics and yield and quality of red pitaya in dry-hot region
The objective of this study was to investigate the advantages of applying organic fertilizer and intercrop-ping on the planting of red pitaya(Hylocereus costaricensis cv.'Tainong No.2').A field experiment was carried out to examine the effects of organic fertilizer application rate(F0:0 t·hm-2 and F20:20 t·hm-2)and intercrop-ping method[MP:monoculture pitaya,IP:pitaya intercropping peanut(Arachis hypogaea)and IS:pitaya inter-cropping soybean(Glycine max)]on soil microbial abundance,soil microbial biomass and soil enzyme activity,as well as the yield and quality in red pitaya orchard in a dry-hot region.The relationship between the yield and quality of red pitaya and soil microbial characteristics were also analyzed.The results showed that compared with F0 treat-ment,F20 treatment significantly increased the abundance of soil bacteria,fungi,actinomycetes and microbial bio-mass carbon,nitrogen and phosphorus,enhanced the activities of soil invertase,urease,acid phosphatase and catalase,and improved the yield and quality of red pitaya.Compared with MP treatment,IP and IS treatment sig-nificantly increased soil microbial abundance,microbial biomass nitrogen and the activities of invertase and urease under F0 and F20 conditions;while IP and IS treatments significantly increased soil microbial biomass carbon,phos-phorus and acid phosphatase activity only under F20 condition.Intercropping significantly increased the fruit yield of red pitaya.IP and IS treatment increased yield by 48.48％and 42.20％under F0 condition,and increased by 25.37％and 29.82％under F20 condition,respectively,when compared with MP treatment.IP and IS treatments significantly increased soluble sugar and vitamin C content with F0 conditions,but significantly increased vitamin C,soluble solids and protein content with F20 conditions.Yield and quality of red pitaya were significantly positively correlated with soil microbial abundance,soil microbial biomass,and soil enzyme activity.The correlation between soluble sugar content and soil catalase activity was not significant.Therefore,the application of organic fertilizer and intercropping peanut or soybean can enhance soil microbial activity,thus improving the yield and quality of red pitaya in dry-hot region.
red pitayaintercroppingorganic fertilizersoil microorganismssoil enzyme activityyield
国家科技期刊平台
NSTL
万方数据
