不同抗旱性春小麦品种的生长分析

在模拟半干旱和水分适宜的大田条件下,对10个春小麦品种的生长动态与抗旱性、产量表现的关系进行了两年研究。结果表明,抗旱品种前期生长平缓,后期叶面积增长快;植株干物质积累多;灌浆成熟期籽粒灌浆速度快;营养器官特别是叶部的功能期较长,积累的干物质再分配到穗部的能力较强。建议旱地品种选育应采用水地和旱地交替种植,以利于对抗旱性和丰产性的双向选择。

Growth Analysis of Spring Wheat Cultivars of Varying Drought Resistance

Under simulated semi-arid and irrigated field conditions, the growth state to drought resistance and yield performance of 10 spring wheat cultivars has been studied for two years.The experimental results showed that the drought-resistant cultivars had the following physiological characteristics: the plant grew gently in the early stage, the leaf area increased fast, the plant dry matter accumulated rapidly in the later period, the velocity of filling grain was fast, the functional stage of nutritive organs, especially the leaves, was longer and the repartition ability of the accumulated dry matter to the spike was strong, etc.It is suggested that the alternate planting in the irrigated and drought field conditions be adopted on drought-resistant variety breeding and be favourable for the double selection to drought resistance and high-yield property.