摘要： 以日光温室栽培的伊丽莎白厚皮甜瓜为试材,探讨了不同坐果数对厚皮甜瓜叶片衰老及干物质积累与分配的影响。结果表明,随着植株坐果数增多,厚皮甜瓜功能叶片衰老加快,表现为:叶片可溶性蛋白质(Pr)和叶绿素(Chl)含量迅速下降,丙二醛(MDA)含量和过氧化物酶(POD)活性快速上升;坐果数增多导致植株叶面积减小,侧枝抽生困难,而比叶重及单位叶面积负荷量增加,单位源光合能力提高,干物质积累量及其在果实中的分配量大增,最终提高单株产量,但单果重偏低。综合分析结果揭示,早熟小果型厚皮甜瓜前茬坐2果较为合适。

关键词: 坐果数, 厚皮甜瓜, 叶片衰老, 干物质积累

Abstract: Effects of different fruit-setting number on leaf senescence,accumulation and distribution of dry matter were studied using the Yilishabai variety grown in solar greenhouse.The results indicated that the increase of fruit-setting number led to rapid senescence of muskmelon leaf,and it was showed that the contents of soluble protein(Pr) and chlorophyll(Chl) declined quickly while the content of malondialdehyde(MDA) and the activity of peroxidase(POD) increased rapidly.With the increase of fruit-setting number,the leaf area decreased and the branches growed difficultly.At the same time,the leaf mass per area,the fruit number per cm2 leaf,the photosynthetic capacity per unit leaf,the accumulation of dry matter and its distribution in fruits increased,resulting in the increase of fruit weight per plant,whereas the single fruit weight reduced.To sum up,it is proper to set two fruits per plant in the first batch for the prematurity and small-fruit muskmelon variety.

Key words: Fruit-setting number, Muskmelon, Leaf senescence, Accumulation of dry matter

中图分类号: 

• S652.01