Effects of weed control, fertilization, and soil cultivation on the growth of Pinus radiata at midrotation in Canterbury, New Zealand
Effects of weed control, fertilization, and soil cultivation on the growth of Pinus radiata at midrotation in Canterbury, New Zealand
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新西兰坎特伯雷杂草控制、施肥和土壤耕作对中轮期辐射松生长的影响
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
P. G. Milne
中科院分区：
文献类型：
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作者：
E. Mason;P. G. Milne
两个析因试验研究了杂草控制、施肥和土壤耕作对辐射松生长的影响。Don Growth于1983年在新西兰的坎特伯雷地区成立。试验前5年每年测定一次，在此期间检测除草和施肥的效果。进行了乳房高度和直径的旋转测量。生长在子区平均高度和断面积每单位面积超过3年的一种情况下，4年的其他，分别到13岁和14岁，进行了分析。结果表明，由于杂草控制和施肥的初始时间增益被保存在旋转中期，并有没有持续的分歧处理和未处理的子地块杂草控制后。然而，有一个网站的表土已被转移到堆在土地清理施肥后继续分歧。模型表明，除草和施肥对林分断面积生长和产量的影响可以用同一个差分方程来表示，并添加一个加性项来表示处理的效果。另一方面，现有的区域增长和产量模型未能适当地代表这些影响。
Two factorial experiments examining effects of weed control, fertilization, and soil cultivation on Pinus radiata D. Don growth were established in the Canterbury region of New Zealand during 1983. The experiments were measured every year for the first 5 years, during which effects of both weed control and fertilization were detected. Midrotation measurements of height and diameter at breast height were taken. Growth in subplot mean height and basal area per unit area over 3 years in one case and 4 years in the other, up to ages 13 and 14, respectively, was analysed. Results showed that the initial time gain due to weed control and fertilization was preserved at midrotation and that there was no continuing divergence between treated and untreated subplots after weed control. There was, however, continuing divergence after fertilization on one site where topsoil had been shifted into heaps during land clearing. Modelling revealed that effects of weed control and fertilization on basal area growth and yield of stands could be represented by the same difference equation with an additive term to represent the effects of treatments. On the other hand an existing regional growth and yield model failed to represent these effects properly.