摘要
在连作5年西瓜的压砂地上,以西瓜→葵花、西瓜→豌豆、西瓜→辣椒、西瓜→棉花茬口土壤为研究对象,采用实验室常规测试方法,分析不同土层压砂地土壤酶活性和土壤养分变化,并以西瓜→西瓜茬口土壤为对照,探讨不同茬口土壤的肥力状况,为压砂地种植制度和施肥提供一定依据。结果表明：0-30cm土壤中对照的土壤中性磷酸酶、蔗糖酶、脲酶活性整体较高,过氧化氢酶活性居中;全氮、硝态氮、速效钾、有效磷、有机质、水分含量在5种茬口中最高。同一作物的土壤过氧化氢酶、脲酶、蔗糖酶活性和有机质、水分、全氮含量随土壤剖面深度加深大体呈增加趋势,其余指标随根系的分布和吸收能力的不同出现分异状态。在连作5年西瓜的压砂地上,西瓜茬口土壤肥力比其余作物土壤肥力更高,西瓜更适应压砂地干旱环境种植。
The watermelon field continuously cropped for five years was investigated between 2007 and 2012in order to analysis the effect of soil enzyme activity and nutrient of gravel-mulched with different crop stubbles（watermelon→sunflower,watermelon→pea,watermelon→chili,watermelon→cotton）in comparison with watermelon→watermelon.The results revealed that,with the increasing of soil depth of the same crop stubbles in the depth of 0-30cm,the content of soil enzyme activity had a significant increase,while total nitrogen,soil organic matter and soil water also showed the increasing tendency with the soil depth.The content of soil enzyme activity with different crop stubbles treatment were all lower than that with continuous watermelon cropping treatment,while other indicators appear with different root distribution and absorbing ability as the differentiation state.All in all,the soil fertility of watermelon crop stubble was higher than the other crop stubbles.The soil of gravel-mulched was more suitable for watermelon.
出处
《北方园艺》
CAS
北大核心
2015年第22期167-172,共6页
Northern Horticulture
基金
国家自然科学基金资助项目(41161085)
关键词
茬口
压砂地
酶活性
土壤养分
crop stubbles
gravel-mulched field
soil enzyme activity
soil nutrient
