| 摘要: |
| 用果实套袋（遮光处理）的方法，研究了6年生M26矮化砧苹果树果实套袋对干物质生产能力的影响。结果表明：生长季节的早期树干周长与单株平均叶面积之间存在显著正相关，相关系数分别为0.87，单株平均全干物质生产量（DM）与果实干物质重（F）之间也呈显著正相关。结果程度（F/L）与叶片干物质生产能力（DM/L）之间，品种及处理中存在极显著正相关，相关系数r=0.88。另外，单果平均叶面积与DM/L值之间呈负相关，相关系数r=-0.47。果实的干物质生产力对树体的干物质生产能力影响较小，树体干物质生产能力（DM/L）大体随叶片光合能力的增强而提高。 |
| 关键词: M26矮化砧 果实套袋；苹果树；干物质生产力 |
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| 基金项目:陕西省科技厅科技攻关项目(2000K01-G9) |
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| Effect of shading fruit by bagging on the dry matter production on apple trees from dwarfing rootstock |
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| Abstract: |
| This essay studied the effect of shading fruit by bagging in the dry matter production in apple trees from M26 Dwarfing Rootstock.The result indicate that there were significant correlations between the trunk girth measured early in the growing season and the total leaf area (r=0.87) and the total leaf number (r=0.89),independent cultivars and the treatments;Total dry matter production per tree (DM) was highly correlated with the fruit dry weight (F).A highly significant correlation (r=0.88) existed between the fruit/leaf dry weight ratio (F/L) and the dry matter production per unit dry weight leaf (DM/L) of the trees.The gradient of the regression lines did not differ significantly between both treatments;even if the bagging and the non bagging treatments were combined,a smaller but significant negative correlation was also found between the leaf area per fruit and DM/L (r=-0.47).The fact that the bagging treatment did not alter these correlations also suggests that the dry matter production by the fruit was not so large as to enhance the total dry matter production rate of the tree sighificantly;The total dry matter production rate per leaf area was increasing with photosynthetic ability strengthening roughly. |
| Key words: M26 of dwarfing rootstock shading fruit by bagging apple trees dry matter production |
