Agricultural Activities of a Meadow Eliminated Plant Litter from the Periphery of a Farmland in Inner Mongolia, China.
Agricultural Activities of a Meadow Eliminated Plant Litter from the Periphery of a Farmland in Inner Mongolia, China.
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中国内蒙古农田周边草甸的农业活动消除了植物凋落物
DOI：
10.1371/journal.pone.0135077
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发表时间：
2015
期刊：
影响因子：
3.7
通讯作者：
Nakamura T
中科院分区：
文献类型：
--
作者：
Kawada K;Borjigin W;Nakamura T
我们的调查的目的是澄清的影响，农业的过程中，在农田周边的凋落物的损失。这项研究揭示了在半干旱地区农田周围观察到的一种生态异常现象的产生过程。我们假设，农田周围的植被不能提供植物凋落物到地面，因为生态结构已被农业活动改变。本研究在内蒙古自治区锡林郭勒盟锡林郭勒草原进行。在强风季节，从耕地边缘到周围的草地，并平行于风向建立了四条研究线。每条线的关键测量点设置在农田与草原的交界处。沿每条线沿着间隔设置4个研究部位。调查了植物凋落物、土壤粒度分布、植物种类组成、植物体积和物种多样性。尽管在所有研究地点的草地上使用相同的割草方法，但农田唯一边缘的凋落物完全消失了。与农田相邻的草原土壤颗粒分布与农田相似。农田边缘和远离农田的植物群落结构不同。这意味着从农田散落的土壤影响了草原的物种组成。因此，在植物群落结构的变化引起的凋落物损失，因为割草。我们得出的结论是，植物凋落物失去了附近的农田，因为农业和割草的综合影响。研究结果支持了我们的假设，即农田周围的植被不能提供植物凋落物，因为生态结构已被农业活动改变。
The purpose of our investigation was to clarify the effects of agriculture on the process of loss of litter at the periphery of a farmland. This study revealed the generation process of an ecologically unusual phenomenon that is observed around cropland in semi-arid regions. We hypothesized that the vegetation around a farmland cannot supply plant litter to the ground surface because the ecological structure has been changed by agricultural activities. The study was conducted at Xilingol steppe, Xilingol League, Inner Mongolia Autonomous Region, China. Four study lines were established from the edge of an arable field to the surrounding meadow and parallel to the wind direction during the strong wind season. Key measurement for each line was set at the border between the farmland and steppe. Four study sites were set at intervals along each line. Plant litter, soil particle size distribution, plant species composition, plant volume, and species diversity were investigated. Despite using the same mowing method at the meadows of all study sites, the litter at the only periphery of the farmland completely disappeared. Soil particle size distribution in steppe, which was adjacent to the farmland, was similar to that of the farmland. Plant community structure at the periphery of the farmland was different from that of the far side from the farmland. This implies that soil scattered from the farmland affected the species composition of the steppe. Consequently, the change in plant community structure induced litter loss because of mowing. We concluded that plant litter was lost near the farmland because of the combined effects of farming and mowing. The results support our hypothesis that the vegetation around a farmland cannot supply plant litter because the ecological structure has been changed by agricultural activities.