Eight-year performance of bareroot Douglas-fir and bareroot and plug western larch Seedlings following herbicide applications, northeast Oregon, USA
Eight-year performance of bareroot Douglas-fir and bareroot and plug western larch Seedlings following herbicide applications, northeast Oregon, USA
复制标题
美国俄勒冈州东北部，施用除草剂后裸根花旗松、裸根和穴盘西部落叶松幼苗的八年表现
作者：
Elizabeth Cole;Amanda A. Lindsay;M. Newton;J. Bailey
西部落叶松(Larix ocsidentalis Nutt.)成活率低，限制了俄勒冈州东北部的人工种植成功。和道格拉斯冷杉(Pseudotsuga menziesii(MIRB.)佛朗哥·瓦尔。Gluca(Beissn.)佛朗哥)苗木。在干旱的夏季，植被管理处理可能会增加土壤水分的有效性，从而增加苗木存活的可能性。2007年春季、2007年夏季和2008年春季分别进行了化学整地处理，以确定这种处理是否能改善巴鲁特道格拉斯冷杉和巴鲁特的存活和生长，并在俄勒冈州埃尔金附近的三个地点堵塞西部落叶松幼苗。尽管一些除草剂处理显著提高了存活率，但不同地点的结果并不一致。总体而言，道格拉斯冷杉在7-8年生后的存活率高于落叶松苗木。种植后7-8年的苗木大小在不同地点和处理之间也有很大的差异，落叶松苗木平均比道格拉斯冷杉苗木高和大。所有种群类型的大小与植被盖度呈负相关，与第一年土壤水分呈正相关。宏观和小气候条件，包括地形和土壤深度，可能是造成生存和生长差异的原因。
Plantation success in northeastern Oregon can be limited by poor survival for western larch (Larix occidentalis Nutt.) and Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco var. glauca (Beissn.) Franco) seedlings. Vegetation management treatments may increase soil moisture availability during the dry summer months, thereby increasing the probability of seedling survival. Chemical site preparation treatments were applied in spring 2007, summer 2007, and spring 2008 to determine if such treatments would improve survival and growth of bareroot Douglas-fir and bareroot and plug western larch seedlings on three sites near Elgin, Oregon. Although some herbicide treatments significantly increased survival, results were not consistent among sites. Overall, Douglas-fir had greater survival after 7–8 years than larch seedlings. Seedling size 7–8 years after planting was also highly variable among sites and treatments with larch seedlings being taller and larger than Douglas-fir seedlings, on the average. Size for all stock types was negatively correlated with vegetative cover and positively correlated with first-year soil moisture. Macro- and microclimatic conditions, including topography and soil depth, were likely contributors to differences in survival and growth.
影响因子：
6.6
作者：
Nakagawa, Shinichi;Schielzeth, Holger
通讯作者：
Schielzeth, Holger