Mid-rotation response of Pinus taeda to early silvicultural treatments in subtropical Argentina
Mid-rotation response of Pinus taeda to early silvicultural treatments in subtropical Argentina
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阿根廷亚热带火炬松对早期造林处理的中期轮作响应
DOI：
10.1016/j.foreco.2020.118317
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发表时间：
2020
影响因子：
3.7
通讯作者：
Carter, David R.
中科院分区：
文献类型：
--
作者：
Schulte, Morgan L.;Cook, Rachel L.;Albaugh, Timothy J.;Allen, H. Lee;Rubilar, Rafael A.;Pezzutti, Raúl;Caldato, Silvana Lucia;Campoe, Otávio;Carter, David R.
南美洲亚热带地区的火炬松种植园产量极高，通常建立在排水良好的红色粘土场地上。过去，由于担心限制场地生产力的因素，土壤排水较差的土地被避免使用。在排水不良的土壤上建立集约化管理的种植园通常包括通过深松和/或铺设垫层进行整地、杂草控制和施肥。然而，森林管理者缺乏关于早期营林做法对改善环境限制的有效性的信息，以及这些集约化做法是否能长期改善这一地区的生产力。因此，我们在阿根廷东北部的两个排水级别和土壤质地不同的地点进行了研究，采用全析因设计，包括场地准备(S；烹调和烹调土壤+深松(红粘土)或垫层(湿壤土))、施肥(F；种植时不施或78公斤每公顷−1元素磷)和杂草防除(W；不施或两年带)。种植7年后，红粘土和湿壤土地块的产量相当，最大处理均值分别为218万m3ha−1和264m3ha−1。在红粘土地块，只有杂草防除显著增加了材积。在湿壤土上，除草和整地都显著增加了材积，这主要是由于增加了存活率。杂草防除和铺垫的组合产生了非加性的体积效应，W*S交互作用显著。我们的结果不支持红粘土上深松的普遍做法。此外，在这两个地点，单独施磷似乎都会适得其反或不必要。
Pinus taedaplantations in subtropical areas of South America are extremely productive and commonly established on well-drained red clay sites. In the past, land with more poorly-drained soil was avoided due to concern over the factors limiting site productivity. Establishment of intensively managed plantations on poorly-drained soils usually includes soil preparation by subsoiling and/or bedding, weed control, and fertilization. However, forest managers lack information about the efficacy of early silvicultural practices to ameliorate environmental limitations and if these intensive practices generate long-term improvements in productivity in this area. Consequently, we established studies in northeastern Argentina on two sites differing by drainage class and soil texture as a full factorial design with site preparation (S; disking and disking + subsoiling (red clay) or bedding (wet loam)), fertilization (F; none or 78 kg ha−1elemental phosphorus at planting), and weed control (W; none or two-year banded). Seven years after planting, the red clay and wet loam sites were equally productive, with maximum treatment means of 218 m3ha−1and 264 m3ha−1respectively. At the red clay site, only weed control significantly increased volume. At the wet loam site, both weed control and site preparation significantly increased volume, mainly due to increased survival. The combination of weed control and bedding yielded a non-additive volume response as indicated by a significant W*S interaction. Our results do not support the common practice of subsoiling on red clay soils. In addition, fertilization with P alone appears counterproductive or unneeded at both sites.
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DOI：
--
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DOI：
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发表时间：
2002
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