[J].HEILONGJIANG AGRICULTURAL SCIENCES,2019,(05):100-103.[doi:10.11942/j.issn1002-2767.2019.05.0100]
苹果不同树形冠层特性季节变化规律和叶片质量及光合特性分析
- 文献标志码:
- A
- 摘要:
- 为提高苹果的产量和品质,选择合理树冠结构的优质树,本文以高纺锤形、自由纺锤形及开心形3种不同树形的苹果树为材料,对冠层特性季节变化规律、叶片质量及光合特性进行了测定和比较。结果表明:5-10月高纺锤形树冠天空可视度高于开心形和自由纺锤形,表明苹果树冠通风透光最好的为高纺锤形,其次为开心形和自由纺锤形。叶片质量最好的为高纺锤形,其次为开心形,自由纺锤形的最差。以光合有效辐射800 mol·m-2·s-1为界值,低于界值时,3种树形的净光合速率随光合有效辐射的增强而增大且变化一致,高纺锤形最高,开心形次之,自由纺锤形最低,高于界值时,净光合速率变化趋于稳定。
参考文献/References:
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备注/Memo
收稿日期:2018-11-26