龙眼幼树整形研究

为了探讨不同树形对龙眼生长、发育的影响,以龙眼幼树为试材,进行了整形修剪研究。试验从2002年幼树定植开始,设置纺锤形、开心形和圆头形(对照)3个处理。试验结果表明,到2004年12月,纺锤形、开心形和圆头形的树高分别为211、126、187cm,纺锤形和圆头形的树高显著高于开心形,纺锤形和圆头形之间的差异不显著;2004年纺锤形、开心形和圆头形的单株产量分别为5.10、4.56、1.10kg;2005年分别为10.30、5.90、1.80kg。纺锤形产量最高,开心形其次,圆头形最少,不同处理之间的差异都达到显著水平。纺锤形具有延长枝生长突出、枝量大、长树快、净光合速率比较高、早期产量高的显著优点,而且整形容易。

A study of training system for young longan trees

In order to explore the suitable framework for growth and development of longan trees, young longan trees were trained into spindle, open and dome-shape systems since planted in 2002. The results demonstrated that the tree height trained to spindle and dome-shape systems was significantly higher than that of open-shaped, reached 211 cm, 126 cm and 187cm until Dec 2004, respectively. The highest yield per tree was obtained by spindle-shaped, reached 5.10 kg and 10.30 kg in 2004 and 2005,respectively,followed by open-shaped, reached 4.56 kg and 5.90 kg in 2004 and 2005,respectively,followed by dome-shaped, reached 1.10 kg and 1.80 kg in 2004 and 2005,respectively. The spindle canopy had such advantages as prominent elongating branches, large quantity of branch, fast finished training system, early bearing and high production. Moreover, the spindle training system is easily operated.