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作 者:吴颖琦 姜佳燕 顾国平 章明奎[3] Wu Yingqi(Yuecheng District Agricultural and Rural Bureau of Shaoxing City,Shaoxing 312071,China)
机构地区:[1]绍兴市越城区农业农村局,浙江绍兴312071 [2]绍兴市农业科学研究院,浙江绍兴312003 [3]浙江大学环境与资源学院,浙江杭州310058
出 处:《安徽农学通报》2019年第20期84-87,共4页Anhui Agricultural Science Bulletin
基 金:绍兴市科技局科技项目“绍兴市砷污染农田安全生产的农艺技术研究”(2018C20006);国家自然科学基金项目(41071145)资助
摘 要:分别从浙江省绍兴市柯桥区和杭州市萧山区选择了9组水田与苗木地成对对比土壤和48个具不同苗木种植时间的系列土壤样点,研究了种植苗木后水稻土水耕表层发生学性状的变化。结果表明,水稻土种植苗木后,除土壤水分状况发生改变外,水耕条件下形成的水耕表层特征也发生了明显的变化。其中,犁底层消失、犁底层与耕作层的容重比变小及土壤结构体表面锈纹锈斑下降可在种植苗木后较短时间内发生;而土壤无定形氧化铁含量下降及氧化铁活化度的下降是1个连续变化的过程;最后水耕表层的特征完全消失。Nine groups of paddy soils and nursery soils were selected from Keqiao District,Shaoxing City,Zhejiang Province,and 48 series of soil samples with different seedling plantation time were selected from Xiaoshan District,Hangzhou City,respectively.The changes of the genetic characteristics of paddy soils after seedling cultivation were studied.The results showed that after seedlings were planted in paddy soils,besides the change of soil moisture con dition,the characteristics of anthrostagnic epipedon formed under the condition of water tillage also changed obvious ly.Among them,the disappearance of plough bottom,the decrease of bulk density ratio between plough bottom and tillage layer and the decrease of rust spots on the surface of soil structure could occur in a short time after planting seedlings,while the decrease of the content of amorphous iron oxide and the decrease of the activation degree of iron oxide in soil was a continuous process.Finally,the characteristics of anthrostagnic epipedon disappearred completely.
分 类 号:S151[农业科学—土壤学] S159[农业科学—农业基础科学]
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