河南农业科学 ›› 2021, Vol. 50 ›› Issue (8): 113-123.DOI: 10.15933/j.cnki.1004-3268.2021.08.014

• 园艺 • 上一篇    下一篇

香梨不同树形冠层结构、光合特性及产量品质的比较

陈久红,马建江,李永丰,位杰,王岩,黄国辉   

  1. (新疆生产建设兵团第二师农业科学研究所,新疆铁门关841005)
  • 收稿日期:2021-01-07 出版日期:2021-08-15 发布日期:2021-09-17
  • 通讯作者: 马建江(1964-),男,四川南充人,研究员,本科,主要从事果树栽培和育种研究。E-mail:1030889926@qq.com
  • 作者简介:陈久红(1992-),男,黑龙江齐齐哈尔人,助理研究员,硕士,主要从事果树高效栽培和生理生态研究。E-mail:1282431377@qq.com
  • 基金资助:
    新疆生产建设兵团第二师铁门关市现代农业科技攻关与成果转化计划资助项目(2020NYGG01,2020NYGG07);新疆生产建设兵团中青年科技创新领军人才计划项目(2019CB032)

Comparison of Canopy Structure,Photosynthetic Characteristics,Yield and Quality of Korla Fragrant Pear with Different Tree Shapes

CHEN Jiuhong,MA Jianjiang,LI Yongfeng,WEI Jie,WANG Yan,HUANG Guohui   

  1. (Agricultural Scientific Institute of 2nd Division of Xinjiang Production and Construction Corps,Tiemenguan 841005,China)
  • Received:2021-01-07 Published:2021-08-15 Online:2021-09-17

摘要: 比较库尔勒香梨疏散分层形和圆柱形2种树形的冠层结构、光合特性及产量品质的差异,为省力高效密植栽培的香梨园整形修剪提供依据。以6年生香梨树为试材,连续2 a应用CI-340手持式光合作用测量系统、CI-110冠层分析仪和树体调查法对比研究疏散分层形和圆柱形树体枝组组成、各冠层部位的光合特性日变化和冠层结构对果实产量和品质的影响。7年生圆柱形树形主干上直接着生主枝数为37.33个,折算枝量为509 975条/hm2,7年生疏散分层形树体主枝数为5.33个,折算枝量为317 487.5条/hm2。2种树形净光合速率日变化在上层外围、上层内膛、中层外围、中层内膛、下层外围均呈现不对称双峰曲线,在下层内膛呈现单峰曲线;2种树形外围的净光合速率均高于内膛,且不同树形不同冠层部位出现峰值、谷值的时间不同;2种树形除了下层内膛外,其他冠层均有明显的光合“午休”现象,比较2种香梨树形各冠层的净光合速率日均值发现,疏散分层形较高,为6.972 6 μmol(/m2·s)。疏散分层形树体叶面积指数显著低于圆柱形,而直射辐射透过系数显著高于圆柱形。疏散分层形香梨的果实单果质量、果实硬度、可溶性糖含量和单株产量均显著高于圆柱形,可溶性固形物在上层外围、上层内膛、中层外围、中层内膛和下层外围均显著高于圆柱形。相关性分析结果表明,净光合速率与蒸腾速率和气孔导度呈极显著正相关(P <0.01),与胞间CO2浓度呈极显著负相关(P <0.01),叶面积指数和直射辐射透过系数呈极显著负相关(P <0.01)。7年生香梨疏散分层形在光合利用效率方面优于圆柱形,其直射辐射透过系数高于圆柱形,在品质和单株产量方面也优于圆柱形,每公顷产量则低于圆柱形。

关键词: 香梨, 树形, 冠层结构, 疏散分层形, 圆柱形, 光合特性, 产量, 品质

Abstract: Comparing the differences of canopy structure,photosynthetic characteristics,yield and quality between delayed‑open central leader system and cylindrical shape of Korla fragrant pear will provide a basis for the training and pruning of Korla fragrant pear orchard in labor‑saving and high‑efficient dense planting cultivation. Using the 6‑year‑old fragrant pear tree as the test material,and the experiment wascarried out for two consecutive years. The CI‑340 handheld photosynthesis measurement system,the CI‑110 canopy analyzer and the tree survey method were used to compare the effects of the tree structure,daily processes of photosynthetic parameters of each canopy part and canopy structure on fruit yield and quality between the two tree shapes. The number of branch groups directly attached to the cylindrical shape trunk of the 7‑year‑old tree was 37.33,equivalent to 509 975 branches per hectare. The number of main branches of the 7‑year‑old was 5.33,equivalent to 317 487.5 branches per hectare.The daily changes of the net photosynthetic rate of the two tree shapes showed asymmetric bimodal curve in the upper periphery,upper inner,middle periphery,middle inner,and lower periphery,and a single peak curve in the lower inner. The net photosynthetic rates of outer periphery of the two shapes were both higher than those of inner,and different tree shapes and different canopy azimuths had different peaks and valleys at different time. Except for the lower inner,the other canopies of the two tree shapes had midday depression of photosynthesis. Comparing the daily average value of the net photosynthetic rate of each canopy in the two shapes found that the value of the delayed‑open central leader system was higher of 6.972 6 μmol/(m2•s). The leaf area index of the delayed‑open central leader system was significantly lower than that of the cylindrical shape,and the transmission coefficient for radiation penetration was significantly higher than cylindrical shape. The single fruit quality,fruit hardness,soluble sugar content and yield per plant of the delayed‑open central leader system fragrant pear were significantly higher than that of the cylindrical shape. The soluble solids in the upper periphery,upper inner,middle periphery,middle inner and lower periphery were significantly higher than the cylindrical shape. The results of correlation analysis showed that the net photosynthetic rate was extremely significantly positively correlated with transpiration rate and stomatal conductance(P<0.01),and was extremely significantly negatively correlated with intercellular CO2 concentration(P<0.01),leaf area index and transmission coefficient for radiation penetration showed a very significant negative correlation(P<0.01). 7‑year‑old Korla fragrant pear of delayed‑open central leader system was better than the cylindrical shape in terms of photosynthetic utilization efficiency,its transmission coefficient for radiation penetration was higher than that of the cylindrical shape,and it was also better than the cylindrical shape in terms of quality and yield per plant,but the yield per hectare was lower than that of the cylindrical shape.

Key words: Fragrant pear, Tree shape, Canopy structure, Delayed?open central leader system, Cylindrical shape, Photosynthetic characteristics, Yield, Fruit quality

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