Báo cáo lâm nghiệp:" Vegetation control and fertilization in midrotation Pinus taeda stands in the southeastern United States" pot

... was ineffective so the imazapyr actually controlled the competing vegetation. Vegetation control and fertilization in Pinus taeda 623 four, respectively (Tab. II and Fig. 4). The range in pine ... fertilization applied singly or in combination is a necessary step in understanding the primary resource limitation to pine growth. In the past, there has been m...

Ngày tải lên: 08/08/2014, 01:21

... seedlings initiated terminal buds after 2 weeks of treatment and 100% initiated terminal buds within 3 weeks. In contrast, 60–70% of the seedlings in the other treatments initiated terminal buds ... during the winter and to produce seedlings with desirable characteristics for planting. High root growth potential at the time of planting is advantageous and in this trial was...

Ngày tải lên: 08/08/2014, 01:21

... According to the standards set by C et al. (1990), the content of calcium in the second year of needles in all the analyzed groups of stands is on the decrease for the growth of trees and, in ... (1988), in the case of calcium and magnesium deficiency in needles, there may occur damage to spruce stands in higher mountain locations. As re- vealed by rese...

Ngày tải lên: 07/08/2014, 10:21

... primordia in summer there is a considerable time-lapse before sprouting in the following spring. During winter the pri- mordia are protected in buds covered by scales and resinous material. In contrast, ... (1-year-old), fully ex- panded needles developed in the current year (new, fully expanded) and needles currently expanding (new, expanding). 2.2. Frost hardening treatm...

Ngày tải lên: 07/08/2014, 16:20

... species and soil types. The first component of the PCA discriminated the two species on the basis of their N, P and Ca foliar concentration. Pinus halepensis seedlings showed higher N and P concentration ... selected Pinus halepensis and Quercus ilex seedlings per plot. The number of Q. ilex seedlings sampled in Yátova 2 (on marl) was 5, and it was not possible to sa...

Ngày tải lên: 08/08/2014, 00:22

... although the start of floral initiation is rather accu- rately known in fruit species, sound information about floral induction and evocation is still lacking. As a preliminary ... axillary buds differen- tiate and may grow out as shoots. The bourse shoot can flower again in the following years and so, by repeated flowering, a cluster of...

Ngày tải lên: 09/08/2014, 04:20

... the preservation of biodiversity and the landscape, etc., are the lengthening of the rotation, retention of part of the trees in final cutting and, to a lesser extent, the thin- ning regime and ... combining more intensive management practices in four cases, with the retention of a portion of the stand in the final cutting, and the extension of rotation to ful...

Ngày tải lên: 08/08/2014, 01:22

... application of the treatments, no difference in inter-row weed biomass was found between the mowed plots (M) and the control (V) (Tab. I). The applica- tion of herbicides in the beginning of the growing ... and H treat- ment for the 1- and 2YS) to 0.74 and 0.76 (V and C for the 1- and 2YS respectively) and was significantly lower in the herbicide-treated...

Ngày tải lên: 07/08/2014, 16:20

... logs and species. In the mean time, due to the increas- ing competition from other materials, e.g. plastic packaging, new procedures should take place in the peeling industry to improve the productivity, ... the yield and the quality of veneers. Some of the evolving technologies concern on-line diagnosis and control systems. These will help the operators and qual...

Ngày tải lên: 07/08/2014, 16:21

... patterns in forest stands of lobolly pine (Pinus taeda L). In: Abstract collection of the international workshop on Ecophysiology and Genetics of Trees and Forest in a Change ... A and gs. The initial slope was different between species and during the growing season. Water use efficiency (WUE) increased as water stress was induced...

Ngày tải lên: 08/08/2014, 18:21