根据近年来各地生产实践的经验表明,低浅易涝的盐碱地区,适当地扩种水稻,不仅能提高粮食产量,而且对盐碱土的改良也有一定的作用。但在盐碱土地区实行这种耕作制度时必须先解决水旱的布局关系。过去有关这方面的文章还很少。根据我们调查,目前盐碱土地区水旱关系上主要存在着如下三个方面的问题,即水稻的选地问题、种植的面积问题和管理技术中一些特殊问题。 稻田选地是作物布局中的一个重要关键。因为选地不好,不仅不能达到高产,而且也对周围土地发生不良影响,使周围作物生长不好,甚至减产。北京通县柴厂屯地区盐碱土稻田的分布主要有如下几个问题。首先分散而不集中,插花散布干旱田之中,有的四周尽是旱作,唯独一块几亩到二三十亩稻田置于其中,造成“水包旱”、“旱包水”的现象。其次是把稻田安置在高 According to the experience of production practice in various places in recent years, it has been shown that the appropriate expansion of paddy in saline-alkali areas with low waterlogging can not only increase grain yield but also play a role in the improvement of saline-alkali soil. However, in the implementation of this farming system in saline-alkali soil, we must first solve the layout relationship between flood and drought. In the past there were still few articles in this area. According to our investigation, there are mainly three problems in the current relationship between water and land in the saline-alkali soil area, namely, the problem of the selection of rice, the area of ​​cultivation and some special problems in management techniques. Paddy field selection is an important part of crop layout. Because of poor selection, not only can we not achieve high yield, but also adversely affect the surrounding land so that the surrounding crops will not grow well or even reduce production. The distribution of the saline-alkali soil paddy fields in Chaitun Tun, Beijing Tongxian County mainly includes the following problems. First of all scattered but not concentrated, flower arrangement scattered dry land, and some are all around the dry farming, only a few acres to twenty or thirty acres of rice fields placed in them, resulting in “drought”, “dry water” phenomenon . The second is to place the paddy fields high