文昌市低效木麻黄林近自然化改造对土壤理化性质的影响  

Effects of low-efficiency ephedra forest in wenchang city on soil physical and chemical properties at the initial stage of near-nature transformation

作　　者：林之盼[1] 薛杨[1] 王小燕[1] 宿少锋[1] 林日武[1] Lin Zhipan;Xue Yang;Wang Xiaoyan;Su Shaofeng;Lin Riwu(Hainan Academy of Forestry,Haikou, Hainan 571100)

机构地区：[1]海南省林业科学研究所,海南海口571100

出　　处：《热带林业》2019年第1期72-76,共5页Tropical Forestry

基　　金：海南省省属科研院所技术开发研究专项(SQ2017JSKF0005):文昌市低效木麻黄海防林近自然更新改造模式研究

摘　　要：对文昌市岛东林场东风作业区低效木麻黄纯林实施套种多树种的近自然化改造,并以低效木麻黄纯林为对照,采用对比分析方法,研究近自然化改造对土壤理化性质的影响。结果表明:(1)0～20cm,各套种模式均比对照模式土壤容重降低,土壤持水量上升,土壤保水能力增强,孔隙度增多,土壤渗透性和透气性得到改善;20～40cm,各套种模式土壤物理性质指标与对照模式无明显差异变化,说明在短期内套种对土壤(0～20cm)物理性质影响效果较好,尤其模式T2土壤物理性质表现最好。(2)各套种模式土壤pH值均呈碱性,土壤有机质、土壤全量养分含量在短期内随不同模式土层变化不同,多数呈现上升趋势,与对照模式差异不明显;林木生长土壤速效养分能力在不同土层均比对照模式差,说明短期内套种对土壤化学性质的影响较弱。因此建议继续跟踪土壤理化性质调查,为低效木麻黄林分经营措施提供参考。The low-efficiency casuarina equisetifolia forest in the Dongfeng Working Area of Wenchang Daodong forestry farm was transformed into near-natural one by interplanting multiple species of casuarina equisetifolia forest,and the effects of interplanting mode on soil physical and chemical properties in the short term were studied by using the comparative analysis method with the low-efficiency casuarina equisetifolia forest as the control. The results showed that:(1)From 0 to 20 cm,the soil bulk density of each intercropping mode was lower than that of the control mode. The soil water holding capacity,soil porosity,soil permeability and air permeability improved.;20~40 cm,there was no significant change in soil physical properties between the interplanting model and the control model, indicating that interplanting had a good effect on soil physical properties(0~20 cm)in the short term, and model T2 had the best performance in soil physical properties.(2)the pH values of soil in all models were alkaline,mainly concentrated between 8.39 and 9.17.The contents of soil organic matters and total soil nutrients in different soil layers in each intercropping model showed an upward trend in most cases in the short term,with no significant changes compared with the control model,and the soil available nutrient capacity was worse than the control model,indicating that intercropping had a weak effect on soil chemical properties in the short term. To sum up,in the short term, the near-nature transformation of low-efficiency casuarina equisetifolia forest can effectively improve the soil physical condition, Therefore,it is suggested to follow up the investigation of soil physical and chemical properties to provide reference for the management measures of stand of casuarina equisetifolia.

关 键 词：低效木麻黄林 近自然化 套种模式 理化性质 

分 类 号：S792.9[农业科学—林木遗传育种]