摘要
对东莞樟木头林场广宁红花油茶林Camellia semiserrata用样地调查法开展土壤理化性质、植物养分调查和测试分析。结果表明,土壤容重随土层加深变大,非毛管孔隙、通气性随土层加深变小。土壤自然含水率为18.5%,容重1.441 g·cm^-3,总孔隙度39.76%。土壤pH值4.42,有机质、全N、碱解N、有效P、速效K值分别为3级、2级、4级、6级和4级。土壤有机质含量较高,碱解N、速效K肥力不高,有效P极度缺乏。叶片有机C含量为491.7 g·kg^-1,全N、全P、全K平均含量分别为15.61、0.51、5.06 g·kg^-1,叶片C:N=31.5:1,C:P=964:1,N:P=30.6:1,叶片P含量极低,表明油茶人工林生长主要受P的限制。
Soil physical and chemical properties and plant nutrients of Camellia semiserrata forest in Zhangmutou forest farm of Dongguan were investigated and analyzed with sample-plot investigation method.The results showed that soil bulk density increased with soil depth,and non-capillary porosity and aeration decreased with soil depth.The natural moisture content of soil is 18.5%,the bulk density is 1.441 g·cm^-3,and the total porosity is 39.76%.The soil pH value is 4.42.The grade of organic matter,total N,alkali hydrolyzed N,available P and available K are 3,2,4,6 and 4,respectively.The content of soil organic matter is high,the fertility of alkali hydrolyzed N and available K is low,and the available P is extremely deficient.The organic C content in leaves is 491.7 g·kg^-1,the average contents of total N,total P and total K were 15.61,0.51 and 5.06 g·kg^-1,respectively.The leaf C:N=31.5:1,C:P=964:1,N:P=30.6:1,and the leaf P content was extremely low,indicating that the growth of C.semiserrata stand was mainly restricted by P.Therefore,in order to promote the healthy growth of the stand and improve the seed setting ability, the C. semiserrata stand land needs appropriate tendingmanagement to improve the soil physical properties, and balanced application of N, P, K fertilizers.
作者
郭业先
柳军
杨绍伟
荣道军
梁金喜
蔡凤玲
张应中
王明怀
GUO Yexian;LIU Jun;YANG Shaowei;RONG Daojun;LIANG Jinxi;CAI Fengling;ZHANG Yingzhong;WANG Minghuai(Zhangmutou Forest Farm of Guangdong,Dongguan,Guangdong 523616,China;Guangdong Provincial Key Laboratory of Silviculture,Protection and Utilization/Guangdong Academy of Forestry,Guangzhou,Guangdong 510520,China)
出处
《林业与环境科学》
2020年第6期52-57,共6页
Forestry and Environmental Science
基金
中央财政林业改革发展资金(林业科技推广示范补助)(2019-GDBS-01)
科技基础资源调查专项(2019FY100801_01)
广东省林业科技创新项目(2019KJCX042)。
关键词
广宁红花油茶
土壤
理化性质
养分
Camellia semiserrata
soil
physical and chemical properties
nutrient
