论文部分内容阅读
黄瓜属浅根性植物,侧根都分布在较浅的土层中,根系极为柔弱,易受损害。如果肥料浓度高,就会发生“烧根”现象,须根不再发展,根端部分呈现枯黄色;植株地上部分则表现为萎缩、叶小、生长点不舒展。此外,黄瓜生长前期(一般定植后一个月内)土壤温度还低,如施肥或浇水太多,就会发生“烂根”,这是由于根系活动能力较弱,不能充分吸收,造成土壤积水过多,空气减少,使根部窒息而腐烂;地上部则表现为叶肉薄,叶色不鲜艳,并容易萎蔫。因此,黄瓜不能一次施肥、浇水过多,而应“少吃多餐”。一般当黄瓜定植缓苗后,开始
Cucumbers are shallow root plants, lateral roots are distributed in the shallow soil, the root system is extremely weak, vulnerable to damage. If the fertilizer concentration is high, the phenomenon of “burning root” will occur, the fibrous roots will no longer develop, and the root end will be withered yellow. The aerial parts of the plants will show shrinkage, small leaves and no growth point. In addition, the early growth of cucumber (usually within a month after planting) soil temperature is low, such as fertilization or watering too much, there will be “rotten roots”, which is due to weak root activity, can not be fully absorbed, resulting in soil volume Water is too much, the air is reduced, the roots are suffocated and decayed; the ground is characterized by thin leaves, leaf color is not bright, and easily wilting. Therefore, cucumber can not be a fertilizer, watering too much, but should “eat more meals.” Generally when cucumber seedlings Huanmiao, the beginning