西北荒漠灌区覆膜条件下苜蓿草地土壤理化性质的时空变化
发布时间：2018-12-14 07:49
【摘要】：覆膜种植是一种增温保墒、增加速效养分的栽培措施,被人们广泛应用在作物栽培上,并取得了丰硕的成果。本研究以不覆盖地膜为对照(CK),研究覆膜(FM)处理对种植紫花苜蓿(Medicago sativa)第2年、第3年和第4年土壤理化性质的影响。结果表明,FM显著降低了第2年和第4年0-20cm土层的年平均pH(P0.05),分别较CK降低了2.7%和2.6%。FM的水溶性盐含量年均值、Na+含量年均值在不同采样年份,不同土层深度的变化趋势均是先升高后下降,且FM均小于CK,FM显著降低了第2年5月的0-20cm土层水溶性盐含量(P0.05),较CK降低了62.9%。FM显著降低了第4年8月、10月0-20cm土层和第2年8月20-40cm土层的Na+含量(P0.05),较CK分别降低了36%、37%和39.5%。FM在一定程度上增加了不同采样年份不同土层速效氮、速效磷、速效钾及有机质含量,但未达到显著水平(P0.05)。
[Abstract]:Film mulching is a kind of cultivation measure of increasing temperature and keeping moisture and increasing available nutrients. It has been widely used in crop cultivation and has achieved fruitful results. The effects of (FM) mulching on the soil physical and chemical properties of alfalfa (Medicago sativa L.) in the 2nd, 3rd and 4th year were studied by using unmulched film as control (CK),. The results showed that FM significantly decreased the annual average pH (P0.05) of 0-20cm soil layer in the 2nd and 4th year, and decreased the annual mean value of water-soluble salt content by 2.7% and 2.6%.FM, respectively, and the annual mean value of Na content in different sampling years. The variation trend of different soil depth was first increased and then decreased, and FM was lower than CK,FM significantly decreased the content of water soluble salt in 0-20cm soil layer in May of the second year (P0.05). Compared with CK, the content of Na in 0-20cm soil layer and 20-40cm soil layer decreased significantly in the 4th year, October and August of the second year (P0.05), and decreased by 36% compared with CK, respectively. To some extent, 37% and 39.5%.FM increased the contents of available nitrogen, available phosphorus, available potassium and organic matter in different soil layers in different sampling years, but did not reach the significant level (P0.05).
【作者单位】： 草业生态系统教育部重点实验室甘肃农业大学草业学院;中-美草地畜牧业可持续发展研究中心;
【基金】：西北荒漠灌区提高苜蓿出苗保苗技术研究(2014030488) 国家牧草产业体系(CARS-35) 苜蓿产业化新技术研究与集成示范推广项目 省农牧厅苜蓿种植技术研究
【分类号】：S812.2
，
本文编号：2378226
[Abstract]:Film mulching is a kind of cultivation measure of increasing temperature and keeping moisture and increasing available nutrients. It has been widely used in crop cultivation and has achieved fruitful results. The effects of (FM) mulching on the soil physical and chemical properties of alfalfa (Medicago sativa L.) in the 2nd, 3rd and 4th year were studied by using unmulched film as control (CK),. The results showed that FM significantly decreased the annual average pH (P0.05) of 0-20cm soil layer in the 2nd and 4th year, and decreased the annual mean value of water-soluble salt content by 2.7% and 2.6%.FM, respectively, and the annual mean value of Na content in different sampling years. The variation trend of different soil depth was first increased and then decreased, and FM was lower than CK,FM significantly decreased the content of water soluble salt in 0-20cm soil layer in May of the second year (P0.05). Compared with CK, the content of Na in 0-20cm soil layer and 20-40cm soil layer decreased significantly in the 4th year, October and August of the second year (P0.05), and decreased by 36% compared with CK, respectively. To some extent, 37% and 39.5%.FM increased the contents of available nitrogen, available phosphorus, available potassium and organic matter in different soil layers in different sampling years, but did not reach the significant level (P0.05).
【作者单位】： 草业生态系统教育部重点实验室甘肃农业大学草业学院;中-美草地畜牧业可持续发展研究中心;
【基金】：西北荒漠灌区提高苜蓿出苗保苗技术研究(2014030488) 国家牧草产业体系(CARS-35) 苜蓿产业化新技术研究与集成示范推广项目 省农牧厅苜蓿种植技术研究
【分类号】：S812.2
，
本文编号：2378226
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