Nitrogen Fertilizer Response of Rocky Mountain Douglas-Fir by Geographic
Nitrogen Fertilizer Response of Rocky Mountain Douglas-Fir by Geographic
复制标题
落基山花旗松地理氮肥响应
DOI：
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发表时间：
1991
期刊：
影响因子：
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通讯作者：
J. V. D. Ploeg
中科院分区：
文献类型：
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作者：
J. Moore;P. Mika;J. V. D. Ploeg
落基山花旗松（Pseudotsuga menziesii var. glauca）对氮肥处理的反应在西北内陆地区之间存在显着差异。在所有地理区域，施肥地块的总断面积和体积增长均显着大于对照的增长，但仅在爱达荷州北部和华盛顿中部，400 lb/ac N 地块的总反应显着高于 200 lb N 地块。蒙大拿州、爱达荷州中部和俄勒冈州东北部的处理地块的净断面积和体积增长并未显着大于任一氮处理的对照。对 2 年定期断面积增量的分析表明，虽然响应确实随着时间的推移而下降，但处理后 6 年后，处理过的地块继续比对照地块产生更多的总生长。类似操作氮气
Response to nitrogen fertil- ization treatments in Rocky Mountain Douglas-fir (Pseudotsuga menziesii var. glauca) differed significantly among geographic regions within the inland northwest. Gross basal area and volume growth on fertilized plots were signifi- cantly greater than growth on controls for all geographic regions, but only in north- ern Idaho and central Washington was gross response significantly greater on 400 Ib/ac N plots than on 200 lb N plots. Net basal area and volume growth on treated plots in Montana, central Idaho, and northeast Oregon were not significantly greater than the controls for either nitrogen treatment. Analysis of 2-year periodic basal area increment indicated that, while response did decline through time, treated plots continued to produce more gross growth than control plots 6 years after treatment. Similar operational nitrogen