求翻译：江苏省纯林多为人工林，其中幼、中龄林面积合计占乔木林总面积的87.96%，混交林则多为自然成熟林。纯林林下土壤有机质、氮钾等养分含量低于混交林，基于对土壤养分竞争胁迫的响应，纯林林下灌草层的根系相较混交林更为发达，因此具有更高的根茎比。是什么意思？

Chunlin, Jiangsu Province, more than the plantation, including the young, the forest area and age together accounted for 87.96% of the total area of ​​the arboreal forest, mixed forest, natural mature forest. Pure forest soil organic matter, nitrogen, potassium and other nutrient content is lower th

Biologists, Jiangsu province for more than one plantation, young, middle-aged forests in forest trees together accounted for 87.96 % of the total area, are much more cataclysmic natural mature forest. The biologists, soil organic matter, nitrogen nutrients such as potassium content of less than nati

The Jiangsu Province pure crop many is the planted forest, in which young, the age forest area sum total accounts for the tree forest total area 87.96%, then the mixed forest is the natural mature forest.Under the pure numerous nutrient content and so on soil ulmin, nitrogen potassium are lower than

Forest plantation in Jiangsu Province, where children, aged forest area in total in total tree forest area of 87.96%, natural mature mixed forest to the forest. Pure forest soil organic matter and nutrients such as nitrogen and potassium content lower than under mixed forest, based on the response o

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