Long-term Growth Response of Douglas-fir to Ammonium Nitrate Fertilizer
Long-term Growth Response of Douglas-fir to Ammonium Nitrate Fertilizer
复制标题
花旗松对硝酸铵肥料的长期生长反应
DOI：
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发表时间：
1983
期刊：
影响因子：
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通讯作者：
R. F. Tarrant
中科院分区：
文献类型：
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作者：
Richard E. Miller;R. F. Tarrant
研究了单次施用硝酸铵肥对IV区刺槐人工林直径、高度和干旱区生长的影响。肥料用量157、314；和471 kg N/ha在15年期间平均分别提高了5%、88%和111%（67、116和146 tn /ha）。二次方程最好地描述了肥料用量与草甸期和三个中间期的毛重和净重生长之间的关系。施肥地块的体积增长在所有时期均超过未施肥地块。在15年的观察期间，对所有N剂量的反应没有显著变化。施肥对林分生长的长期积极影响既归因于树木营养的改善，也归因于树木生长对林分结构的次生效应。森林科学。29:127 - 137。
The effect of a single application of ammonium nitrate fertilizer on diameter, height, arid volume growth of a Site IV plantation of Pseudotsuga menziesii was measured repeatedly during a 15-year period. Fertilizer dosages of 157, 314; and 471 kg N/ha increased gross volume growth during the 15-year period by an average of 5 I, 88, and 111 percent, respectively (67, 116, and 146 tn3/ha). Quadratic equations best described the relationship between fertilizer dosage and gross and net volume growth during the erttite period and during three intermediate periods. Volume growth on fertilized plots exceeded that on unfertilized plots in ail periods. Response to all N dosages did not change significantly during the 15-year period of obserVation. The positive, long-term effect of fertilizer on stand growth is attributed both to improved tree nutrition and to secondary effects of increased tree growth on stand structure. FOREST SCI. 29:127-137.