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通过对黑龙江省富裕县苗圃的杨树扦插苗施肥试验发现 ,施肥能促进苗木的高、径生长。施肥最理想比例为N2 P3K4 、Ν2 P4 K3和N3P1K3,高生长最大可比对照提高 2 6cm ,增幅 19.4 % ;径生长最大可比对照提高 0 .11cm ,增幅 9.7% ,并可获得良好的经济效益
Through fertilization experiment on the poplar cuttings in nursery of Fuyu County, Heilongjiang Province, it was found that fertilization can promote the height and diameter growth of seedlings. The best ratio of fertilization was N2 P3K4, Ν2 P4 K3 and N3P1K3, and the maximum height growth could be increased by 26.4cm or 19.4% compared with the control; the maximum diameter growth could be increased by 0.11cm or 9.7% compared with the control, and good economic benefit could be obtained