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黄土高原的气候、土壤、地形差异很大,形成了复杂的生态环境。目前有些地方存在的问题,不是以生态环境选择相适应的良种(生态型),而是让品种适应不良的各种环境和生产条件。为了取得小麦全苗、匀苗、壮苗、齐苗达到高产,我们对旱地小麦的生态型及创造高产的生态条件进行了调查研究。一、旱地小麦生态型旱地小麦的生态特征,首先要有强大的根系。根系发达,长得快、扎得深,地下比地上发育快,冬前初生根100厘米以上,次生根达50厘米以上。到越冬期,土壤深层温度比地表高7℃左右,根的生长更加迅速。武功小麦越冬期根系可伸至2米以上,每天达1厘米多。这样,能充分利用土壤深层水分,保证春
The climate, soil and topography of the Loess Plateau are very different and form a complex ecological environment. At present, the problems existing in some places are not the good varieties (ecotypes) adapted to the choice of ecological environment, but the various environmental and production conditions that make the varieties adapt to the poor. In order to obtain wheat seedlings, uniform seedlings, strong seedlings, Qi Miao to achieve high yield, we have the ecological type of dry land wheat and create high yield ecological conditions were investigated. First, the ecological characteristics of dryland wheat ecological dryland wheat, we must first have a strong root system. Developed roots, grow fast, tie deep, the ground faster than the development of the ground, winter before the root of more than 100 cm, the secondary root of more than 50 cm. To wintering, soil depth temperature is about 7 ℃ higher than the surface, root growth more rapidly. Martial arts winter wheat root system can be extended to more than 2 meters, up to 1 cm more each day. In this way, can make full use of soil moisture, to ensure that spring