黄土旱塬地区小麦抗旱性的生理生态分析

对两个抗旱性强的旱地小麦品种和一个抗旱性弱的水地品种,在不同水肥条件下进行了生态生理学的系统比较研究.结果表明,两个旱地品种分别属于御旱力较强的旱肥型和耐旱力较强的旱薄型.它们各自形成的系统发育条件和适应干旱的方式有所不同.在黄土旱塬地区.抗旱育种指标应着重于御旱性状,各项耕作栽培措施应紧紧围绕"种好"、促进种子根下扎、培育壮苗这一中心环节.鉴定抗旱性的田间试验应采用水肥双重控制法.

An Eco-Physiological Analysis of Winter Wheat in Loess Rainfed Highland

A systematically comparative study had been carried out in 1961-1964 with two strong drought resistance dryland varieties and one drought susceptible irrigated variety of winter wheat under different soil mositure and fertility conditions.A serious of results indicated that the two dryland varieties belong to two main types:dryland-high fertility type with stronger drought avoidance,and dryland-low fertility type with stronger drought tolerance and weaker drought avoidance,both of thier characteristics is formed from different system developmental condition and thier adaptations to drought are different in many aspects also.In the loess plateau rainfed highland,the criteria for drought resistance breeding should be determined by the avoidance characteristics,all of tillagecultivation practices should around to "good sowing in autumn",in other words,to promote the primary root system downward deeply and seedling growth strongerly.Double controls with soil moisture and fertilizer should be used in field experiment for determine drought resistance.