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| Effects of Different Cultivation Mode and Cultivation Systems on Soil Environment |
| ZHANG Xue-yan1，2，TIAN Yong-qiang2，GAO Li-hong2 ，GUO Yu-xiao3 |
| 1Agronomy College，Ningxia University，Yinchuan 750021，Ningxia，China|2College of Agronomy and Biotechnology，China Agricultural University，Beijing 100193，China|3Beijing Agricultural Technology Extension Station，Beijing 100029，China |
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Abstract Taking soil being planted over 30 years as material，we compared different facilities including greenhouse，big-arch shelter，open field，and different cultivation systems including continuous cropping，catching cropping and rotation cropping on soil nutrition，soil enzyme and soil microbe．The result indicated that that the soil EC value，total nitrogen，organic matter，available nitrogen，available potassium，nitrate nitrogen content，sucrase，neutral phosphatase，catalase in continuous cropping were significantly higher than that in catching cropping in greenhouse（S1），continuous cropping in big-arch shelter（S2），rotation cropping in big-arch shelter（S3）and open field planting（S4），while its pH value was significantly lower than the other treatments．In S4 treatment，the available nutrient，ammonium nitrogen content，catalase activities were remarkably lower than other treatments．Comparing with S2，S3 could reduce the accumulation of available nutrient，ammonium nitrogen and nitrate nitrogen，and increase bacteria，fungi，actinomyces population significantly. According to correlative analysis，the soil nutrient contents，except available potassium were positively correlated with soil EC value，but had negative correlation with pH value．The sucrase，urease，neutral phosphatase and catalase activities had correlation with soil nutrient content．The bacteria population had negative correlation with available potassium，and bacteria and actinomyces population had remarkable negative correlation with ammonium nitrogen content．In conclusion，open field planting was the most effective way for maintaining soil quality．The soil quality in big-arch shelter was between the greenhouse and open field．Catching cropping in greenhouse and rotation cropping in big-arch shelter could improve by different degrees the soil quality both in greenhouse and big-arch shelter，separately．
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Received: 03 August 2011
Published: 11 October 2010
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