摘要
不同的桑树品种 ,不同的穗芽位置 ,因温度不同 ,发育所需的积温和时间也不同。为了掌握桑树发育的有效积温 ,准确预测桑树叶质的成熟期及采叶收蚁时间 ,于 2 0 0 1、2 0 0 2年以云桑 1号、湘 792 0等为材料 ,测定发育积温。结果 ,在 2 0～ 2 8℃条件下桑树的发育积温随温度的增加而增加 ,发育所需时间随温度的增加而缩短。在 2 0℃、2 4℃、2 8℃的温度下 ,湖桑 32号的转青期积温比湘 792 0分别增加 5 0 .3℃、6 0 .2℃和5 8.8℃ ;雀口期积温比湘 792 0分别增加 5 9.6℃、6 4.9℃和 6 6 .0℃ ;开叶期积温比湘 792 0分别增加 6 0 .0℃、6 6 .3℃和 70 .2℃。
The developmental accumulation temperature and time of mulberry varies with different varieties, buds and temperature. During 2001～2002, mulberry varieties Yunsang 1 and Xiang 7920 were investigated to know the effective accumulation temperature of mulberry development and calculate the accurate mature period and harvest time of mulberry leaf. The results show that the development accumulation temperature increases with temperature increase and its developmental time decreases with temperature increase under 20～28℃, and the accumulation temperature of turning green, beak-like stage and leaf-spreading period are higher 50.3℃, 60.2℃ and 58.8℃; 59.6℃, 64.9℃and 66.0℃; and 60.6℃, 66.3℃ and 70.2℃ than theirs of Xiang 7920 under 20℃, 24℃ and 28℃ respectively.
出处
《贵州农业科学》
CAS
2003年第6期27-30,共4页
Guizhou Agricultural Sciences
