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对容器基质重与油茶苗生物量及基质失水程度与苗木过氧化氢酶、过氧化物酶、电导率等生理生化特性的关系进行了测定。结果表明:(1)容器基质重量与油茶地上部分的生物量呈正相关,其回归方程为:y=0.059x+0.919 4。(2)在不同失水程度下,基质与茎叶的重量比值变化趋势为负抛物线型。(3)叶片相对电导率随着失水程度的增加呈先降后升的趋势,且在失水20%左右时,相对电导率达到最低值,随后开始急剧上升。(4)2种酶活性随着失水程度的增加也呈先降后升、最后失活的趋势,且在失水40%时,活性达到最高峰,随后逐步下降。(5)所有试验表明在失水20%时苗木各项生理指标处于一个最佳状态。因此,今后在油茶容器苗培育过程中,一定要注意苗木水分的科学控制,使容器基质失水程度控制在20%以内。
The relationship between the matrix weight of the container and the biomass of the Camellia oleifera seedlings, the degree of water loss of the matrix and the physiological and biochemical characteristics such as catalase, peroxidase and electrical conductivity of the seedlings were determined. The results showed that: (1) There was a positive correlation between the weight of the substrate and the biomass of aerial part of Camellia oleifera. The regression equation was y = 0.059x + 0.919 4. (2) Under different degrees of water loss, the change trend of the weight ratio of matrix to stems and leaves was negative parabola. (3) The relative conductivity of leaves showed the trend of decreasing firstly and then increasing with the increase of water loss, and when the water loss was about 20%, the relative conductivity reached the lowest value and then began to rise sharply. (4) The activities of the two enzymes decreased first and then increased with the increase of the degree of dehydration. Finally, the activity of the two enzymes tended to deactivate. When the water loss was 40%, the activity peaked and then decreased gradually. (5) All tests showed that the physiological indicators of seedlings in a best condition when water loss 20%. Therefore, in the future cultivation of oleifera container seedlings, we must pay attention to the scientific control of seedling moisture, so that the extent of water loss control of the container matrix within 20%.