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在青海省黄土丘陵区设立了72个山生柳标准样地,采集标准植株样品,测定其生物量,并研究了立地因子对区域山生柳生物量的影响。结果显示:样地山生柳生物量变幅较大,在0.34~31.19t/hm2,样地平均生物量为6.17t/hm2;山生柳地上部分生物量平均占总生物量的59.71%,地下部分平均占40.28%,不同土质类型中草甸土、灰褐土地区山生柳茎根比偏小,显示出山生柳根系的发育相对较强;山生柳林总生物量与盖度成正相关,与坡度、坡位没有明显正相关联系,在海拔为2 800~3 400m的陡坡、中坡位及阴坡条件下显示出明显的生长优势。
In the loess hilly region of Qinghai Province, 72 standard samples were set up, and the standard plant samples were collected and their biomass was measured. The effects of site factors on the biomass of P. yunnanensis were studied. The results showed that the variation of biomass was mainly from 0.34 to 31.19 t / hm2, and the average biomass was 6.17 t / hm2. The aboveground biomass of P. salina accounted for 59.71% of the total biomass, Part of the average percentage of 40.28%, different soil types of meadow soil, gray-cinnamon soil Yamayutai ratio is too small, showing the growth of Salix roots is relatively strong; , But not significant positive correlation with slope and slope position. It showed obvious growth superiority under steep slope, mid-slope position and shady slope with elevation of 2800 ~ 3400m.