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作 者 ：陈波涛 王欣 殷建强 姚建勇 李宏

期 刊 ：林业科学 1999年 35卷 zk期 页码：91-94

关键词：杉木；林地；土壤肥力；观测；

Keywords:Chinese fir, Woodland, Soll fertility, Monitoring,

摘 要 ：为了解造林后杉木林地土壤肥力的变化情况及施肥对林地土壤肥力的影响,经对杉木中心产区土壤肥力中等的杉木林地设固定样地,进行土壤肥力的观测研究。结果表明,杉木林地施肥后土壤的理化性质得到了明显的改善。施肥后第2年,土壤的含P量,P₂和P₂K₁处理分别比对照提高了13%和21%,而P₂K₁处理的速效和缓效K比对照提高了20%和19.5%;施肥后第4年其含P量分别高25%和28%,而P₂K₁处理的速效和缓效K比对照提高了21%和29%;造林后,随着林龄的增加杉木林地的土壤肥力呈逐年下降的趋势。造林5年后,离树干距离40cm的土壤含N、P、K肥的下降比例较树干距离80cm的低。

Abstract:The trial of soil fertility monitoring was carried out in Chinese fir woodland at Zhongchao(25°44′to 26°31′N latitude，108°37′to 109°31′E longitude，Altitude 500 to 670 m)，Located in Liping Countv， Guizhou Province．The trial area was 1.44 hm²．The trial resuits were as follows： 1．After fertilization，the chemical and physical properties of soil in Chinese fir woodland improved apparently．In the second year after fertilization，the contents of available P in the P₂ treatment and the P₂K₁treatment increased 13％and 21％respectively，compared with control，while the content of the availableK and the slowly available K increased 20％and 19.5％respectively comparing with control．In the fourthyear after fertilization，the content of P in the treatment of P₂ and P₂K₁ increased 25％and 28％comparing to control，and the rapidly available K and the slowly available K in the P₂K₁ treatment increased 21％and 29％respectively． 2．The soil fertility of Chinese fir woodland decreased year by year after planting．In the fifth year after planting，the decline proportion of N，P and K content in the soil located at 40 cm from the trunk，waslower than that in the soll which was 80 cm from the trunk．

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