Effects of vegetation treatment on the survival and growth of Schima wallichii Choisy and Schima superba Gardn. Et Champ in Son La and Gia Lai provinces
Keywords:
Schima wallichii Choisy,, Schima superba Gardn., Et Champ, vegetation controlAbstract
Effects of three different vegetation treatments on the survival and growth
of Schima wallichii Choisy and Schima superba Gardn. Et Champ were
examined in Son La and Gia Lai provinces during 2013-2016. The three
vegetation treatments including (i) completely weeded by slashing, (ii)
partly weeded around planting holes with diameter of 2m and (iii) line
weeded with 2m in width and leaving unweeded with 1m in width
interval.
Three years after experiment the higest survival, basal diameter and
seedling crown increments were recorded in completed weeded treatment
for both species. While higest increments of total height were found in
partly weeded treatment for S. superba in Gia Lai and in completely
weeded for S. wallichii in Son La. The differences of survival rate and
growth parametrs were not significant when comparision between
completely weeded and partly weeded treatments (P>0.05). However, the
survival rate and growth parameters of the seedlings in those 2 treatments
were significaltly better compared to that in line weeded (P < 0.05).
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