论文部分内容阅读
由植株徒长引起的“空棵”是因为在西瓜伸蔓的中后期,温度适宜,肥水充足或在西瓜的雌花开放授粉期浇水追肥不当。表现形态:茎叶生长过旺,植株龙头与地面的夹角超过45度,呈向上或直立生长,节间长度10厘米以上,叶色嫩绿有光,瓜胎刚一出现就黄花脱落。还有一种现象是授粉后2-8天幼瓜落掉。防治措施:勤观察,发现有上述形态时,首先采取深埋蔓,或疏去部分枝蔓削弱植株长势,促使瓜胎稳健发育。并结合人工辅助授粉,促使瓜胎坐稳。第二可捏茎或夹根,控制地上部分生长,促进地下部分生长在西瓜授粉时,在瓜胎前面的秧子上用力一捏,听得“咔吧”一声即可,如
Caused by the plant lengthened “empty tree ” because in the middle and late stages of watermelon stretch, the temperature is appropriate, adequate fertilizer or watermelon in the female open pollination period inappropriate watering dressing. Morphology: Stems and leaves over-growth, the leading angle between the plant and the ground over 45 degrees, was up or upright growth, internode length of 10 cm or more, leaf color green and light, melon just appeared yellow flower off. There is also a phenomenon that pollen 2-8 days after the melon fall out. Prevention and treatment measures: Qin observation, found that the above morphology, the first to take deep vine, or sparse part of the vine to weaken the growth of plants, to promote the steady development of melon birth. Combined with artificial pollination, to promote melon and fetal stability. The second can be pinched or pinch root, control the growth of the ground part of the promotion of underground growth in the watermelon pollination, the melon in front of the seedlings on the hard pinch, hear “carbazole ” can be heard, such as