Criteria and principles for selection of dryland wheat varieties

The selection of fine varieties is an important measure to increase the yield of dryland wheat. It can not only make full use of the natural resources of the dry land, but also give full play to the yield increase benefits of the cultivation measures, and has a very important effect on the increase of agricultural production in dry land.

1. The basic criteria for selection of dryland wheat varieties: drought resistance, cold resistance, dry and hot wind resistance, strong tillering ability, number of spikes, rapid grouting, stable production in drought year, high yield in high water production, realizing flood and drought, and stable production high yield.

2. The basic principles for selecting dryland wheat varieties are as follows: First, it is based on drought-tolerant and stable yield, combined with high yield and high quality, taking into account the early maturity of varieties. In the late growth period of dryland wheat, the occurrence of dry hot winds is high, and the damage is heavy. Early-maturing varieties are good for avoiding the harm of dry hot wind and are beneficial to saving water. The second type is mainly winter-type cultivars, and weak spring varieties are used as supplements for late cultivars. Drought often occurs during the sowing of dryland wheat, affecting timely sowing of wheat, and the sowing time of semi-wintering varieties is very flexible. It can not only achieve seedlings overwintering, but also avoid serious freezing injury, and can be suitable for sowing in the case of rushing seeds and timely sowing. In the case of relative late sowing, the advantage of strong tillering ability and multiple spikes is used to ensure more panicles and achieve high and stable yields. Poor spring cultivars have a relatively long grouting time, are vulnerable to early summer droughts and dry hot winds, cause insufficient grouting, and reduce the 1000-grain weight, so they can only be used as late pod supplements.

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