摘要
油茶林地夏季高温干旱,土壤板结,生草是一种有效的解决方式。为了探讨生草对油茶林地土壤特征的影响情况,选择人工种植的百喜草和自然生长的马唐草为研究对象,对比分析了不同草种生草区生草根际和油茶根际土壤酶活性、土壤养分、有机质含量、土壤微生物数量和土壤p H值的差异性特征。结果表明:(1)生草区根际土壤酶活性显著高于非根际土壤,微生物数量也高于非根际土壤;(2)土壤养分含量,根际区土壤有机质、有效P、有效K、有效N含量均显著高于非根际区(P<0.05),根际区全N、全P、全K含量均高于非根际区,但其含量差异不显著,p H值的变化也不明显;(3)有机质、全N、有效N、有效P含量与脲酶、蔗糖酶活性间均呈显著正相关,有效K含量与过氧化氢酶、酸性磷酸酶活性间呈显著正相关,有效P含量与土壤细菌、真菌、放线菌间均呈极显著正相关,有机质含量与土壤细菌、真菌间均呈极显著正相关,土壤脲酶与细菌和放线菌间均呈正相关,蔗糖酶与细菌间呈正相关;(4)生草对土壤养分、有机质均有较大的积累和转化作用,土壤酶脲酶、蔗糖酶活性和微生物数量均表现为根际区>非根际区;从土壤肥力的综合水平来看,百喜草>马唐草>对照,百喜草可以作为油茶林地生草草种推荐使用。
It＇s heat and dry in summer in Camellia oleifera forest land. And the weather can compact the soi.Sod culture is an effective way to solve this problem. In order to study the effects of sod culture on the soil characteristics of Camellia oleifera forest land, this paper selected the artificial cultivated Paspalum notatum and the natural growth of Digitaria sanguinalis as the research object. The enzyme activity in rhizosphere soil, soil nutrient, organic matter, soil microbial quantity and soil pH in Camellia oleifera rhizosphere and rhizosphere in different grass species of sod-culture were compared and analyzed in this article. Research shows： （1） Soil enzyme activity in rhizosphere soil was higher than that in non-rhizosphere soil, and the number of microorganisms was higher than that of non- rhizosphere soil. （2） Soil nutrient, organic matter, effective P, available K and effective N in rhizosphere were significantly higher than those in non-rhizospherc （P 〈 0.05）, and total N, total P and total Kin rhizosphere were higher than those in non-rhizosphere. But the difference of content was not significant, change of pH was not obvious.（3） There was a significant positive correlation between organic matter, total N, available N, content of available P and urease and saccharase activity. The content of effective K was positively correlated with catalase and acid phosphatasc activity. There was a significant positive correlation among the content of effective P and soil bacteria, fungi, actinomycetes.There was a significant positive correlation between the content of organic matter and soil bacteria and fungi. Soil urcase was positively correlated with bacteria and actinomycetes, invertase was positively correlated with bacteria.（4） Sod culture has a great accumulation and transformation effect on soil nutrients and organic matter. Soil enzyme urcase, invertase activity and microbial population all showed as the rhizosphere area is better than non-rhizosphere area. From the comprehensive level of soil fertility, Paspalum notatum is higher than Digitaria sanguinalis, Digitaria sanguinalis is higher than Control. Paspalum notatum can be used as recommended sod culture in Camellia oleifera forest land.
作者
傅聿青
李江
李建安
孙颖
雷小林
贺义昌
王金凤
FU Yuqing;LI Jiang;LI Jian＇an;SUN Ying;LEI Xiaolin;HE Yichang;WANG Jinfeng(Saihanba Machinery Tree Farm of Hebei province,Weichang 068466,Hebei,China;Central South University of Forestry and Technology,a.The Key Lab of Non-wood Forest Products of State Forestry Administration;b.The Key Lab of Cultivation and Protection for Non-Wood Forest Trees of Education Ministr;c.2011 Cooperative Innovation Center of Cultivation and Utilization for Non-Wood Forest Trees of Hunan Province,Changsha Hunan 410004,China;3.Jiangxi Academy of Forestry,Nanchang 330013,Jiangxi,China)
出处
《经济林研究》
北大核心
2018年第3期82-88,共7页
Non-wood Forest Research
基金
湖南省重点研发计划项目“油茶减施增效复合生态经营模式与技术研究”(2016NK2153).
关键词
油茶
生草栽培
土壤微生物
土壤养分
土壤酶活性
Camellia oleifera
sod culture
soil microbes
soil nutrient
soil enzyme activity
