The effect of clipping and phytophagous nematodes on net primary production of blue grama, Bouteloua gracilis
The effect of clipping and phytophagous nematodes on net primary production of blue grama, Bouteloua gracilis
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刈割和植食性线虫对蓝禾谷 Bouteloua gracilis 净初级生产力的影响
DOI：
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发表时间：
1983
期刊：
影响因子：
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通讯作者：
N. Stanton
中科院分区：
文献类型：
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作者：
N. Stanton;N. Stanton
在一个环境室中，盆栽的非菌根蓝草在地上（0、中度和重度修剪）和地下（每盆0,50或500个植食线虫）三个水平上进行草食。净初级产量（NPP），包括芽和冠，在修剪和线虫感染后显著下降。根系也随着修剪而下降，但未修剪植株的中度线虫感染（50）显著增加了根重，尽管NPP仍然较低。植食性线虫密度随剪枝量的增加而减少，但随剪枝量的增加而增加，达到对照（未剪枝）水平的三倍以上。重度剪枝和中度剪枝结合高植食线虫数量均可降低取食细菌线虫的密度。
Pots of non-mycorrhizal blue grama in an environmental chamber were subjected to three levels of both above ground (0, moderate and heavy clipping) and below ground (0, 50 or 500 phytophagous nematodes per pot) herbivory. Net primary production (NPP), including shoots and crowns, decreased significantly with clipping and nematode infection. Roots also declined with clipping, but moderate nematode infection (50) on unclipped plants significantly increased root weight although NPP was still less. Phytophagous nematode densities decreased with heavy clipping but increased with moderate clipping to over three times the control (unclipped) level. Bacterial feeding nematode densities were depressed both by heavy clipping and by moderate clipping combined with high phytophagous nematode numbers.