马铃薯对水分的要求

• 作 者: 门福义 陈尚达
• 机 构: 内蒙古农牧学院,宁夏固原地区农科所,
• 出 处: 宁夏农业科技
• 发表日期: 1986年02期
• 关键词: 马铃薯产量 干物质生产 旱生形态 地下根系 吸收面积 马铃薯植株 优质农肥 地上茎叶 绿叶面积 整薯播种

一、水分的生理作用马铃薯的体细胞和组织必须有适量的水分,没有水或者水分不足,地上茎叶萎缩变小,地下根系扩大,呈旱生形态;当水分充足时,则地上部茎叶繁茂扩大,地下根系变小,呈多水形态。在正常的水分条件下,地上和地下部可以得到均衡发展,而呈正常形态。若从提高光合的角度讲,似乎地上部茎叶应该繁茂扩大,以增加干物质生产;而从水分生理的角度讲,似乎地上部茎叶应该小,地下根系应该大,以减少水分的散失和扩大根系的吸收面积。如何调节地上部和地下部的关系,是获得马铃薯块茎高产的重要关健。

First, the physiological effects of water Potato somatic cells and tissues must have the right amount of water, no water or water shortage, the ground stems and leaves shrink smaller, underground roots expand, was a drought form; when the water is sufficient, the aboveground stems and leaves Lush expansion, underground roots become smaller, showed a multi-water form. Under normal conditions of water, the aboveground and underground parts can be balanced development, but normal form. From the standpoint of improving photosynthesis, it seems that shoots and stems on the ground should flourish to increase dry matter production. From the perspective of hydroponic physiology, it seems that shoots on the upper ground should be small and underground roots should be large in order to reduce the loss of water and Expand the root absorption area. How to adjust the relationship between the shoot and the ground, is an important key to the high yield of potato tubers.