福建省将乐县杉木人工林林地土壤养分状况

The Soil Nutrient Status of Chinese Fir Forest in Jiangle County,Fujian Province

在福建省将乐国有林场,选取典型杉木人工林样地18块,对其土壤化学性状进行测定分析。结果表明:将乐杉木人工林地土壤呈酸性;土壤全氮和碱解氮含量随土层深度增加而显著递减;全磷和有效磷垂直变化不明显,且有效磷含量都小于5 mg·kg^(-1),缺磷比较严重;土壤全钾明显低于土壤速效钾的变异程度,钾素能够满足树种生长的需求。在杉木林经营过程中,合理适量的施用氮磷肥有利于林地地力的维持,特别是磷肥。

The 18 plots of typical Chinese fir plantation were selected at the Jiangle state-owned forest farm, and analysis the soil chemical properties. The result showed that, the Jiangle Chinese fir plantation soil present acidity ; the content of total nitrogen and al- kali solution nitrogen decreased significantly with the increase of soil depth;the vertical variation of total phosphorus and available phosphorus was not obvious, and the available phosphorus content was less than 5 mg · kg^- 1 , the phosphorus deficiency was more serious ;the degree of variation of total potassium in soil was significantly lower than that of available potassium in soil, potassium can meet the needs of tree growth. In the process of Chinese fir forest management ,the reasonable application of nitrogen fertilizer is beneficial to maintain soil fertility, especially phosphate fertilizer.