西北荒漠灌區(qū)覆膜條件下苜蓿草地土壤理化性質的時空變化
發(fā)布時間：2018-12-14 07:49
【摘要】：覆膜種植是一種增溫保墑、增加速效養(yǎng)分的栽培措施,被人們廣泛應用在作物栽培上,并取得了豐碩的成果。本研究以不覆蓋地膜為對照(CK),研究覆膜(FM)處理對種植紫花苜蓿(Medicago sativa)第2年、第3年和第4年土壤理化性質的影響。結果表明,FM顯著降低了第2年和第4年0-20cm土層的年平均pH(P0.05),分別較CK降低了2.7%和2.6%。FM的水溶性鹽含量年均值、Na+含量年均值在不同采樣年份,不同土層深度的變化趨勢均是先升高后下降,且FM均小于CK,FM顯著降低了第2年5月的0-20cm土層水溶性鹽含量(P0.05),較CK降低了62.9%。FM顯著降低了第4年8月、10月0-20cm土層和第2年8月20-40cm土層的Na+含量(P0.05),較CK分別降低了36%、37%和39.5%。FM在一定程度上增加了不同采樣年份不同土層速效氮、速效磷、速效鉀及有機質含量,但未達到顯著水平(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).
【作者單位】： 草業(yè)生態(tài)系統(tǒng)教育部重點實驗室甘肅農業(yè)大學草業(yè)學院;中-美草地畜牧業(yè)可持續(xù)發(fā)展研究中心;
【基金】：西北荒漠灌區(qū)提高苜蓿出苗保苗技術研究(2014030488) 國家牧草產業(yè)體系(CARS-35) 苜蓿產業(yè)化新技術研究與集成示范推廣項目 省農牧廳苜蓿種植技術研究
【分類號】：S812.2
，
本文編號：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).
【作者單位】： 草業(yè)生態(tài)系統(tǒng)教育部重點實驗室甘肅農業(yè)大學草業(yè)學院;中-美草地畜牧業(yè)可持續(xù)發(fā)展研究中心;
【基金】：西北荒漠灌區(qū)提高苜蓿出苗保苗技術研究(2014030488) 國家牧草產業(yè)體系(CARS-35) 苜蓿產業(yè)化新技術研究與集成示范推廣項目 省農牧廳苜蓿種植技術研究
【分類號】：S812.2
，
本文編號：2378226
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