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以莲雾优系农科二号为试材,采用人工疏果方式设不同留果量和结果部位处理,研究其对单果重、果长、果顶宽和可溶性固形物含量的变化。结果表明:穗留果量为2、3个时,单果重、果长、果顶宽、可溶性固形物含量均极显著高于对照;穗留果量为4个时,单果重、果长均显著高于对照,可溶性固形物含量极显著高于对照。树冠内膛果实较外围果实大而长,单果重、果长差异极显著,果顶宽差异显著,可溶性固形物含量差异不显著。树冠外围中、下部果实的单果重大于上部,且果顶显著宽于上部;中、下部果实显著或极显著长于上部;上部果实可溶性固形物含量极显著高于中、下部。由此可见,疏果有利于果形、单果重和内在品质的形成,建议每穗留果2~4个,选择树冠内膛和外围中部结果为主。
Taking Liangyouyou Nongke No.2 as test material, different fruit weight and result parts were treated by artificial fruit thinning method to study the changes of fruit weight, fruit length, fruit top width and soluble solid content. The results showed that the fruit weight, fruit length, fruit top width and soluble solid content were all significantly higher than those of the control when the amount of spike stay was 2 and 3. Significantly higher than the control, soluble solids content was significantly higher than the control. The crown of the canopy was larger and longer than that of the outer fruit, the fruit weight and the fruit length were significantly different, and the difference of the fruit top width was significant. The content of soluble solids was not significant. The fruit weight of the middle and lower part of the crown periphery was higher than that of the upper part, and the fruit top was significantly wider than the upper part. The fruit of the middle and lower part was significantly longer than the upper part and significantly higher than the upper part. The content of soluble solids in the upper part was significantly higher than that in the middle part and lower part. Thus, thinning fruit is conducive to the formation of fruit shape, fruit weight and internal quality, it is recommended to leave fruit per spike 2 to 4, select the middle crown and the outer shell of the main results.