The aims of this work were 1) to evaluate the changes in soil properties with the application of different amounts of vermicompost (10 and 20 Mg?ha–1), and 2) to construct a soil quality index that allows the evaluat...The aims of this work were 1) to evaluate the changes in soil properties with the application of different amounts of vermicompost (10 and 20 Mg?ha–1), and 2) to construct a soil quality index that allows the evaluation of changes in the most sensitive soil parameters. The study was carried out in a cattle field of General Alvear, Buenos Aires, Argentina. Vermicompost application showed a positive effect on most of the chemical and biological soil properties evaluated, especially with the higher dose (20 Mg?ha–1). There were slight but significant increases in electrical conductivity and soil pH with the higher dose of vermicompost. Physical soil properties were not affected by the vermicompost amendment. The SQI showed a significant increase of soil quality with the vermicompost dose of 20 Mg?ha–1, especially by enhancing the biochemical and biological properties.展开更多
黄土高原东部农田土壤物理质量下降是限制该地区农业生产的重要因素之一,合理的种植制度能够改善土壤物理质量。本试验于2016年设置连续夏绿豆-冬小麦(MB-WW,T_(1))、2年夏玉米-冬小麦+2年夏绿豆-冬小麦(2 a SC-WW+2 a MB-WW,T_(2))及...黄土高原东部农田土壤物理质量下降是限制该地区农业生产的重要因素之一,合理的种植制度能够改善土壤物理质量。本试验于2016年设置连续夏绿豆-冬小麦(MB-WW,T_(1))、2年夏玉米-冬小麦+2年夏绿豆-冬小麦(2 a SC-WW+2 a MB-WW,T_(2))及连续夏休闲-冬小麦(SF-WW,T_(3))3种种植制度,分析实施第3和4年的土壤物理质量,以探索潜在的适宜于改善研究区土壤物理质量的种植制度。结果表明:T_(1)处理下冬小麦收获后0~30 cm各土层毛管孔隙度较T_(2)和T_(3)处理分别显著提高了19.20~28.49%和18.86~31.86%。此外T_(1)处理夏播作物收获后,10~20 cm土层土壤储水量较T_(2)显著增加了6.37%,20~30 cm土层土壤质量含水量和储水量较T_(2)处理分别显著增加了7.87%和4.70%。相较于T_(3),冬小麦和夏播作物收获后T_(1)和T_(2)处理下土壤容重、总孔隙度和土壤固、液、气三相比偏离值没有得到明显的改善。综上所述,绿豆-冬小麦种植制度对土壤物理质量有一定的改善,采用连续夏绿豆-冬小麦种植制度可能是改善黄土高原东部农田土壤物理质量潜在的措施之一。展开更多
文摘The aims of this work were 1) to evaluate the changes in soil properties with the application of different amounts of vermicompost (10 and 20 Mg?ha–1), and 2) to construct a soil quality index that allows the evaluation of changes in the most sensitive soil parameters. The study was carried out in a cattle field of General Alvear, Buenos Aires, Argentina. Vermicompost application showed a positive effect on most of the chemical and biological soil properties evaluated, especially with the higher dose (20 Mg?ha–1). There were slight but significant increases in electrical conductivity and soil pH with the higher dose of vermicompost. Physical soil properties were not affected by the vermicompost amendment. The SQI showed a significant increase of soil quality with the vermicompost dose of 20 Mg?ha–1, especially by enhancing the biochemical and biological properties.
文摘黄土高原东部农田土壤物理质量下降是限制该地区农业生产的重要因素之一,合理的种植制度能够改善土壤物理质量。本试验于2016年设置连续夏绿豆-冬小麦(MB-WW,T_(1))、2年夏玉米-冬小麦+2年夏绿豆-冬小麦(2 a SC-WW+2 a MB-WW,T_(2))及连续夏休闲-冬小麦(SF-WW,T_(3))3种种植制度,分析实施第3和4年的土壤物理质量,以探索潜在的适宜于改善研究区土壤物理质量的种植制度。结果表明:T_(1)处理下冬小麦收获后0~30 cm各土层毛管孔隙度较T_(2)和T_(3)处理分别显著提高了19.20~28.49%和18.86~31.86%。此外T_(1)处理夏播作物收获后,10~20 cm土层土壤储水量较T_(2)显著增加了6.37%,20~30 cm土层土壤质量含水量和储水量较T_(2)处理分别显著增加了7.87%和4.70%。相较于T_(3),冬小麦和夏播作物收获后T_(1)和T_(2)处理下土壤容重、总孔隙度和土壤固、液、气三相比偏离值没有得到明显的改善。综上所述,绿豆-冬小麦种植制度对土壤物理质量有一定的改善,采用连续夏绿豆-冬小麦种植制度可能是改善黄土高原东部农田土壤物理质量潜在的措施之一。
