蔬菜大部分为异花授粉作物,繁种时为确保品种种性和纯度必须隔离,而空间隔离是应用最广泛的隔离方式,它通常在繁殖大量常规品种、杂交种时采用。生产上时常发生因种子质量低劣而导致减产绝产现象。这主要是繁种时由于不同种类或品种间隔离不当所造成的。采用空间隔离时应注意以下几个问题: 一、隔离距离问题目前,生产上常用的隔离距离均为经验数字,按此执行一般不出问题,纯度和种性也有保证。隔离距离一般分四类:一是不同亚种、变种或类型间极易杂交,一般隔离2000 Most of the vegetables are cross-pollination crops, in order to ensure species diversity and purity must be isolated, and space isolation is the most widely used isolation methods, it is usually used in the breeding of a large number of conventional varieties, hybrids. Production often occurs due to poor quality of the seeds and lead to reduced production of abortion. This is mainly caused by the improper separation of different species or varieties during breeding. Space separation should pay attention to the following questions: First, the isolation distance problem At present, the production of commonly used isolation distance are empirical figures, click here to perform generally no problem, purity and species are guaranteed. Isolation distance generally divided into four categories: First, different subspecies, varieties or types of extremely easy to cross, the general isolation 2000