【摘要】 为评价间作牧草对果园土壤质量的影响,对河北省晋州市马于镇梨园间作牧草根际土壤的pH、微生物群落数量、酶活性及各因素间的相关性进行了研究。结果表明:间作牧草根际土壤pH、真菌数、放线菌数和脲酶活性有垂直分布特征;二月兰增加土壤pH、放线菌数和过氧化物酶活性(0~20cm土样),降低脲酶活性;早熟禾降低pH,增加真菌数(0~20cm)和脲酶活性;黑麦草降低过氧化物酶活性(0~20cm)和增加脲酶活性(21~40cm);pH与土壤深度、过氧化物酶活性与放线菌量和pH、放线菌量与pH等显著正相关,放线菌量与土壤深度、脲酶活性与土壤深度和pH等显著负相关,放线菌量与间作牧草显著相关。因此,该梨园中二月兰与早熟禾共同间种于2行梨树间将可能获得更好的土壤质量。更多还原

【Abstract】 To evaluate effects of intercropping pastures on the soil quality in the pear orchard distributed at Mayu Town of Jinzhou City,Hebei Province,China,soil pH,soil microbes,and soil enzyme activities were measured at two depth levels(0~20cm and 21~40cm)of the rhizosphere soils of three pastures(Orychophragmus violaceus(L.)Schulz),Poa annua L.,and Lolium perenne L.)intercropping plots.Subsequently,the correlation between above factors was analyzed.Five main results were obtained.First,pH values,fungi numbers,actinomycetes numbers,and urease activity differed at two depth levels.Second,pH values,actinomycetes numbers,and peroxidase activity(0~20cm)were highly improved by the intercropping O.violaceus.By contrast,urease activity was decreased in this intercropping plot.Third,pH value was decreased in the intercropping plot of P.annua,and fungi numbers(0~20cm)and peroxidase activity were highly improved.Fourth,peroxidase activity was decreased and urease activity was highly improved in the intercropping Lolium perenne L.plot.Finally,there had significant positive correlation between pH values and soil depths,between peroxidase activities and actinomycetes numbers,between peroxidase activities and pH values,and between actinomycetes numbers and pH values.In addition,there had significant negative correlation between actinomycetes numbers and soil depths,between urease activities and soil depths,and between urease activities and pH values.Also,there had significant correlation between actinomycetes numbers and intercropping pastures.Therefore,the soil quality would be greatly improved when O.violaceus(L.)Schulz)and P.annua L.were simultaneously planted between pears.更多还原