旱坡地间作群体对作物根际微生物数量的影响
Effects of intercropping system on rhizosphere microorganisms in dry slopping land

研究了由玉米、草带、辣椒构成的不同间作群体对云南山区旱坡地土壤微生物数量的影响，结果表明：间作玉米和间作辣椒的草带根际微生物数量均高于其它间作和单作处理，其草带的根际细菌、真菌、放线菌和自生固氮菌数量平均值分别是玉米顺坡单作和辣椒单作的4.49倍和22.00倍，3.91倍和6.10倍，6.15倍和26.29倍，4.75倍和5.72倍；间作草带的玉米和辣椒其各类根际微生物数量均高于玉米和辣椒单作；玉米间作辣椒行比为4∶4和6∶6模式的根际土壤微生物数量多于2∶2模式。总的来说，玉米间作辣椒、玉米间作草带和辣椒间作草带的根际土壤微生物数量均多于各作物单作，为进一步改善旱坡地土壤根际微生物环境和明确间作群体根际土壤微生物效应提供了依据。
The effects of different intercropping groups composed of maize, grass strips and pepper on the number of soil microbes in dry slopes land of Yunnan mountain area were studied. The results showed that: The number of rhizosphere microbes of intercropping grass strips with pepper and maize was higher than that of other intercropping and monoculture treatments. The average number of rhizosphere bacteria, fungi, actinomycetes and azotobacter in the two kinds of intercropping grass strip patterns was 4.49 and 22.00 times, 3.91 and 6.1 times, 6.15 and 26.29 times, 4.75 and 5.72 times of that of downslope maize monoculture and pepper monoculture respectively. The number of rhizosphere microbes of maize and pepper intercropped with grass strips was higher than maize monoculture and pepper monoculture. The number of rhizosphere microbes of intercropping maize with pepper 4∶4 and 6∶6 was higher than that of 2∶2. In a word, the amount of rhizosphere microbes of intercropping maize with pepper, maize with grass strips, and pepper with grass strips is higher than monoculture and it can provide the basis for further defining the effects of rhizosphere microbes on intercropping systems to improve soil microbial growth environment.