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在蔬菜管理过程中,第一关就是育苗,只有培育好壮苗,才能为蔬菜丰产打下良好基础。但在育苗过程中,常出现一些异型苗,定植时达不到壮苗标准,缓苗时间长,常严重影响蔬菜产量,根据多年的实践经验,蔬菜异型苗的发生情况有如下几种。一、老头苗 1.发生症壮老头苗主要是苗龄过长,低矮不长,根系老化,不长新根,叶片深绿肥厚。 2.发生原因老头苗发生原因是多方面的,如苗床土沙白;土壤板结,透气
In the process of vegetable management, the first level is nursery, nurturing strong seedlings only in order to lay a good foundation for vegetable yield. However, in the process of nursery, often there are some shaped seedlings, seedlings can not reach the standard when planting, Huanmiao a long time, often seriously affect the yield of vegetables, according to many years of practical experience, the occurrence of vegetable shaped seedlings are as follows. First, the old head of Miao 1. Occurrence Zhaoli old Miao Miao main age is too long, low not long, root aging, not long new roots, leaves dark green hypertrophy. 2. The causes of old head seedlings occur for many reasons, such as soil bed sand white; soil compaction, breathable