Soil Phosphorus Dynamics as Influenced by Land Use Changes in Humid Tropical, Southwest China

YANG Jing-Cheng; HUANG Jian-Hui; PAN Qing-Min; TANG Jian-Wei; HAN Xing-Guo

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Soil Phosphorus Dynamics as Influenced by Land Use Changes in Humid Tropical, Southwest China

机译：西南湿润地区土地利用变化对土壤磷素动态的影响

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Land use changes can greatly influence soil phosphorus (P) dynamics, especially when converting native forests to agricultural land. Soils in Xishuangbanna, which is one of southwest China's tropical areas that maintain fragments of primary forests, were studied to a) evaluate the effect of two common land use changes, conversion of forests to agricultural land or rubber tree plantation, on the dynamics of available P and total P in bulk soils as well as total P in particle size fractions; b) assess the relationship between soil P dynamics and soil organic carbon (SOC); and c)elucidate the relationship between soil P content and soil properties such as pH and texture. Clearing secondary forests with subsequent shifting cultivation and establishment of rubber tree plantation caused significant decreases (P ＜ 0.05)in available P at 0-20 cm soil depths, whereas for total P there was a significant decrease (P ＜ 0.05) when converting to shifting cultivation, rubber tree plantation, or fallow field at both 0-20 and 20-40 cm depths. Abandonment of fields used for shifting cultivation led to significant increases (P ＜ 0.05) in available P at 20-40 cm depth. In addition, there was a significant positive relationship between soil organic carbon and soil P content. Compared to secondary forests, the ratio of organic carbon to total P in surface soils (0-20 cm) of shifting cultivation and rubber tree plantation was significantly lower (P ＜ 0.05).

机译：土地利用变化会极大地影响土壤磷（P）的动态变化，尤其是在将原始林转变为农田的情况下。研究了中国西南部热带地区之一的西双版纳州土壤，该地区保留着原始森林，研究结果如下：a）评估两种常见土地利用方式的变化，即森林向农地的转化或橡胶树人工林对可利用动力的影响。散装土壤中的磷和总磷，以及粒径分数中的总磷; b）评估土壤磷动力学与土壤有机碳（SOC）之间的关系; c）阐明土壤P含量与土壤性质（例如pH和质地）之间的关系。砍伐次生林并随后进行轮作种植和建立橡胶树人工林会使土壤深度为0-20 cm的有效磷显着下降（P ＜0.05），而总磷在转换为轮作时显着下降（P ＜0.05）。种植，橡胶树种植或休耕地（0-20厘米和20-40厘米深度）。放弃用于轮作栽培的田地，导致20-40 cm深度的有效磷显着增加（P ＜0.05）。此外，土壤有机碳与土壤磷含量之间存在显着的正相关关系。与次生林相比，轮作和橡胶林表层土壤（0-20 cm）中有机碳与总磷的比率显着降低（P ＜0.05）。

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来源
《土壤圈（英文版）》 |2005年第1期|24-32|共9页
作者
YANG Jing-Cheng; HUANG Jian-Hui; PAN Qing-Min; TANG Jian-Wei; HAN Xing-Guo;
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作者单位

Laboratory of Quantitative Vegetation Ecology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China;

Beijing Natural History Museum, Beijing 100050, China;

Laboratory of Quantitative Vegetation Ecology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China;

Laboratory of Quantitative Vegetation Ecology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China;

Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Yunnan 666303, China;

Laboratory of Quantitative Vegetation Ecology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China;

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收录信息中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
原文格式 PDF
正文语种 chi
中图分类农业基础科学;
关键词
land use change; particle size fraction; phosphorus; rubber tree plantation; shifting cultivation;

机译：土地利用变化;粒径分数;磷;橡胶树人工林;轮作;

Soil Phosphorus Dynamics as Influenced by Land Use Changes in Humid Tropical, Southwest China

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