Under different plant density and fertilizer regime, LAI and LAD changed as a curve with a single peak, whereas NAR changed as a wide "V" during the whole growing season.
不同密度和施肥处理下，马铃薯群体LAI、LAD在全生育期内均呈单峰曲线变化，NAR呈阔U形曲线变化。
The result shows that there are obvious difference in the colonization rate, density and species number of AMF when the inocula are soil from the different plant community.
结果表明：用不同植物群落的土样作为接种物，三叶草菌根侵染率和根际AMF种类和密度有很大差异，但菌根真菌种类数目较多；
Effect of plant density and fertilizer application on plantain yield in two soils from Colombia with different natural fertility is shown (Table 2).
表2说明了在哥伦比亚的两种不同天然肥力土壤上种植密度及肥料用量对大蕉产量的影响。
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