成熟林 meaning in English
mature forest
ripe wood
ripewood
Examples
- The reduction of soil nutrient content and enzyme activity , and the apparent increase of soil acidity and bulk density are likely the main reason for soil degradation in mature stand
土壤养分和酶活性的降低以及土壤酸度和容重的显著增加是成熟林土壤质量降低的主要原因。 - Compared with its characteristics in land resources with more mountains and steep sloop farmland , the land in guizhou province is over farming , a broad land in appropriate for developing as plantation , forestry or pastureland is not used in full
13为有林地中成熟林和过熟林不且且仅面积小，且下降趋势明显；用材林中近、过、成熟林资源更濒临枯竭，蓄积量还达不到1979年的水平。 - The results showed the trend of soil ifi changes was partial " u " , namely , during the course of artificial picea succession , soil ifi decreased sharply at the initial stage , after artificial picea reaches mature forest , soil ifi recovered slowly and reached soil ifi of natural coniferous forest finally
在人工云杉林地中，土壤ifi表现出非正“ u ”型的变化，即云杉幼林向成熟林演替时，土壤ifi迅速下降，大约在云杉40龄出现自疏之后，土壤ifi回升，但恢复速度十分缓慢。 - According to the request of relevant forest reserves assets assessment technical specification , combining the resources of the bamboo grove and manage the characteristic , expound and assess non - ripe forest and ripe forest separately from theory method to application of embodiment , prove the feasibility of the method
根据有关森林资源资产评估技术规范的要求，结合竹林资源经营特性，从理论方法到实例应用，分别对未成熟林和成熟林进行论述、评估，验证评估方法的可行性。 - Mongolica young stand , secondary natural forest , and the mixed forest of larix olgensis and fraxinus mandshurica rupr . . countermeasures for controlling soil degradation were also recommended . the study got following results : ( 1 ) from young stand to mid - age of larix olgensis , with the closure of canopy and the decrease of undergrowth vegetation cover , soil acidity , enzyme activity , total inorganic phosphorus , available k , soil moisture and total porosity decreased significantly ; while soil organic matter content , humus component content , the amount of three main types of microbes , acid phosphatase activity , and bulk density in rhizosphere soil and non - rhizosphere soil increased with the increase of the amount of forest floor litter ; from mid - age stand to near mature stand , with the decrease of stand density and crown cover as well as the restoration of undergrowth vegetation after preliminary thinning , soil organic matter content , fulvic acid , exchangeable acidity , exchangeable aluminium , neutral phosphatase activity , total amount of inorganic phosphorus , the amount of actinomycetes , soil moisture , and total porosity in rhizosphere soil and non - rhizosphere soil apparently increased ; from near matu re stand to mature stand , soil activity acidity , organic matter content , humus component content , available phosphorus , total amount of amino acid , available k , soil enzyme activity , soil moisture , and total porosity in rhizosphere soil and non - rhizosphere soil decreased , but total phosphorus , soil acidity ( in particular , exchangeable aluminium ) , and bulk density increased
结果表明： ( 1 )从落叶松幼龄林到中龄林，随着林冠的郁闭和林下植被盖度的急剧下降，林地土壤酸度、土壤酶活性、无机磷总量、速效钾、土壤水分含量、总孔隙度呈明显下降趋势，而根际和非根际土壤有机质含量、腐殖质各组分含量、三大类微生物数量、酸性磷酸酶活性和土壤容重随着凋落物的增加呈明显上升趋势；从中龄林到近熟林，由于抚育间伐，林分密度及郁闭度下降，林下植被盖度逐步得到恢复，根际与非根际土壤有机质含量、富里酸、交换性酸、交换性铝、中性磷酸酶、无机磷总量、放线菌数量、土壤水分含量、总孔隙度呈明显的上升趋势；从近熟林到成熟林，随着林龄的增大，根际与非根际土壤活性酸、有机质含量、腐殖质各组分含量、有效磷含量、氨基酸总量、速效钾、土壤酶的活性、土壤水分含量和总孔隙度呈下降趋势，而根际与非根际土壤全磷含量、土壤酸度(特别是交换性铝)和容重呈增加趋势。