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林业科学 ›› 1999, Vol. 35 ›› Issue (zk): 84-90.

• 土壤肥力监测 • 上一篇    下一篇

杉木幼林水土流失及养分损耗的研究

盛炜彤   

  1. 中国林业科学研究院林业研究所 北京 100091
  • 出版日期:1999-01-01 发布日期:1999-09-25
  • 基金资助:
    国家自然科学基金重点项目“杉木、桉树人工林长期生产力保持机制的研究”

SOIL, WATER AND NUTRIENT LOSS IN YOUNG PLANTATION OF CHINESE FIR

Weitong Sheng   

  1. Research Institute of Forestry, CAF Beijing 100091
  • Online:1999-01-01 Published:1999-09-25

摘要:

对设置于江西分宜县中国林科院亚林中心5组不同整地方式水土流失多年观测结果进行了综合分析。地表径流量从1.47~13.22 mm,平均为5.46 mm。径流系数从0.098%~0.852%,平均为0.369%,年均土壤侵蚀量从0.0051~0.2510 t/hm2,平均为0.1005 t/hm2。整个幼龄林阶段,地表径流量546.0 m3/hm2,土壤侵蚀总量为1005.0 kg/hm2;养分损失量:N1.9560 kg/hm2, P2.2370 kg/hm2, K26.777 kg/hm2,有机质50.049 kg/hm2。分析认为在板、页岩风化物上发育的黄红壤,特别是腐植质层较厚结构良好的土壤,具有较强的抗腐蚀能力,不管采用哪种整地方式均无明显的水土流失和养分损失,但比较而言,以穴垦为最佳选择。水土流失还不是此种土壤上杉木人工林的地力退化的最主要的原因。

关键词: 杉木人工林, 整地方式, 地表径流, 土壤侵蚀

Abstract:

A comprehensive analysis was conducted on the long-term observation data from the five groups of runoff plots set up in Chinese fir young plantation at the Experimental Center of Subtropical Forestry, CAF in Fenyi, Jiangxi.The results showed that the range of surface runoff was 1.47 ~ 13.22mm with average of 5.46 mm, the range of runoff coefficient is 0.098 %~ 0.852 % with average of 0.369 %, the range of soil erosion is 0.0051 ~ 0.2510 t/hm2 a year with an average of 0.1005 t/hm2.During the w hole juvenile stage of the plantation, the total surface runoff is 546.0m3/hm2, the total soil erosion was 1005.0 kg/hm2, the nutrient loss was 1.9560 kg/hm2 for N, 2.2370 kg/hm2 for P, 26.777 kg/hm2 for K, and 50.049kg/hm2 for organic mater.We conclude that for the sites with red or yellow soil derived from shale, especially with the well structured soil and thick humus layer, it has strong resistance to soil erosion, and there are no significant influences on soil erosion no matter what the ways are adopted in sites preparation. Comparatively speaking, the hole site proparation way is better than others.Therefore, soil erosion may not be the main reason for the site fertility degradation of Chinese fir plantation at the sites with this type of soil.

Key words: Chinese fir plantation, Site preparation ways, Surface runoff, Soil erosion