本文選題：有毒植物　切入點：土壤物理性質(zhì)　出處：《草地學報》2016年03期 　論文類型：期刊論文

【摘要】：瑞香狼毒(Stellera chamaejasme)是我國主要毒草之一。為了明確瑞香狼毒對草地土壤性狀的影響,在北方農(nóng)牧交錯帶草原,于瑞香狼毒生長季(5-9月)連續(xù)取樣分析了其發(fā)生區(qū)及鄰近未發(fā)生區(qū)土壤的物理、化學和生物學特性。結(jié)果表明,瑞香狼毒發(fā)生區(qū),表層土壤(0~10cm)含水量在干旱季節(jié)(5-6月)顯著高于未發(fā)生區(qū),土壤容重、土壤總孔隙度和毛管孔隙度未見明顯變化。發(fā)生區(qū)土壤有機質(zhì)、全氮、堿解氮、速效鉀含量以及土壤pH值與未發(fā)生區(qū)亦無顯著差異,而5-9月速效磷含量顯著高于未發(fā)生區(qū)。發(fā)生區(qū)7月微生物生物量碳、氮和磷顯著高于未發(fā)生區(qū)。整個生長季土壤脲酶、磷酸酶、蔗糖酶活性均顯著高于未發(fā)生區(qū);過氧化氫酶活性5-6月顯著高于未發(fā)生區(qū),7-9月則與未發(fā)生區(qū)無顯著差異;過氧化物酶活性5-6月亦顯著高于未發(fā)生區(qū),7-9月卻顯著低于未發(fā)生區(qū)。瑞香狼毒能在一定程度上改善土壤理化性狀,提高土壤生物學活性。瑞香狼毒滋生蔓延不是造成草地退化的原因,而是草地退化導致的結(jié)果。
[Abstract]:Stellera chamaejasme (Stellera chamaejasme) is one of the main poisonous grasses in China. The physical, chemical and biological characteristics of the soil in its occurrence area and adjacent non-occurrence area were analyzed. The water content of surface soil was significantly higher than that of non-occurring area in drought season, but soil bulk density, soil total porosity and capillary porosity did not change significantly. Soil organic matter, total nitrogen, alkali-hydrolyzed nitrogen were found in the occurrence area. There was no significant difference in available potassium content, soil pH value and no occurrence area, but the available phosphorus content in May and September was significantly higher than that in no occurrence area. In July, microbial biomass carbon, nitrogen and phosphorus in the occurrence area were significantly higher than those in the non-occurrence area, and the soil urease content in the whole growing season was significantly higher than that in the non-occurrence area. The activities of phosphatase and sucrase were significantly higher than those of the non-occurrence area, and the activity of catalase was significantly higher in May and June than that in the non-occurring area, but there was no significant difference between July and September. The activity of peroxidase was also significantly higher in May and June than that in non-occurrence areas, but was significantly lower than that in non-occurrence areas. Stellera chamaejasme could improve soil physical and chemical properties to some extent. To improve soil biological activity. The breeding and spreading of chamaejasma chamaejasme is not the cause of grassland degradation, but the result of grassland degradation.
【作者單位】： 北京市農(nóng)林科學院北京草業(yè)與環(huán)境研究發(fā)展中心;中國林業(yè)科學研究院林業(yè)研究所;
【基金】：公益性行業(yè)(農(nóng)業(yè))科研專項經(jīng)費項目(201203062)資助
【分類號】：S812.6

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本文編號：1557185