بررسی اثرات روشهای مختلف هرس در تجدید سرسبزی و استحصال چوب و بذور تاغکاریها

Pruning and reaping different quantities (P1-5) of air biomass of the haloxylon trees were studied in two different haloxylon planted areas from the viewpoint of vigority [Tolombehkhoshk (T) and Baqerabad (B)]. It was done within the format of the design of fully random blocks with five treatments [pruning from the 10 cm over the collar (P1), pruning 150 cm of the top branches (P2), pruning 100 cm of the top branches (P3), pruning 50 cm of the top branches (P4) and control (P5)] and four repetitions as possible ways to remove wilting state, dying status and revive the vigor condition of hand-planted shrubs. The index of VI = H (CD) a-1 was accepted out of many quantitative indexes as the symbol of vigority (quality) which could show the vigorous quality in the form of a quantitative quantity after testing in hand-planted shrubs of Kerman province. The average of this index in each of the three germinating conditions (vigorous, wilting and dying) was 1370, 780 and 280 respectively. The statistical studies showed that there was a significant difference among its quantities in different degrees of vigority. In other words, the quantities of this index, in addition to the size of growth showed its quality (the vigority degree) as well. The analysis of the data in LSD method during a 5-year research (germinating years of 2004 to 2008) showed that the impact of P1 and P2 on the growth of height and diameter of the crown of trees and also VI in both regions of T and B were significant. The results showed that the intensive pruning (P1 & P2) are able to increase the growth of height and the growth of the diameter of the crown of wilting haloxylon and rejuvenate their vigority and freshness. Key words: haloxylon, pruning, crown diameter growth, height growth, vigority

Keywords:

تاغ ها , هرس , رشد , کیفیت , بیماری های گیاهی