论文部分内容阅读
岷江上游干旱、半干旱河谷5年生辐射松人工幼林的营养元素含量、贮量与分配的研究结果表明:不同立地和气候条件下生长的辐射松人工林,其生长差异较大,营养元素含量与贮量也存在较大差异;树高不同,营养元素含量也有差异;各器官中元素含量以氮最高;由于研究地区土壤富含有效铁,故微量元素铁在乔灌木根系及草本植物中含量极高。辐射松人工幼林营养元素贮量为310.47 kg/hm2,其中乔木层、灌木层、草本层和枯落物层营养元素贮量分别占总贮量的52.25%、15.25%、30.84%和1.66%;分析得知,随生境不同,辐射松人工林乔木层营养元素贮量差异较大。
The results showed that the growth of Pinus radiata plantations grown in different locations and climatic conditions was quite different, the content of nutrient elements and There is also a big difference in the amount of storage; different tree height, nutrient content is also different; the highest content of nitrogen in each organ; due to the rich soil available iron, so the content of trace elements iron in the shrubs and roots of herbaceous plants high. The nutrient content of young Pinus radiatus plantation was 310.47 kg / hm2, of which 52.25%, 15.25%, 30.84% and 1.66% of the total storage capacity of arbor, shrub layer, herb layer and litter layer respectively. Analysis shows that, with different habitats, radiata pine plantation tree layer nutrient content of the larger differences.