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水资源是限制我国雨养旱作区农业发展的主要因素之一,如何提高作物水分利用效率是当前面临的主要问题。2013在张家口雨养旱作区,研究了杂交谷子品种张杂谷3号在不同种植密度(7.5万株/hm2和15.0万株/hm2)下产量和水分利用效率的变化。结果表明:在自然降雨较为充足条件下,张杂谷3号的主要供水来自于0~100 cm土壤,稀植栽培条件下,其平均产量为6 787.78 kg/hm2,较对照常规品种冀张谷5号(平均产量5 518.43 kg/hm2)增产23.00%以上,差异达到了显著水平(P<0.05)。其中,在种植密度为7.5万株/hm2时水分利用效率最高,可以达到24.10 kg/(hm2·mm),是对照的1.26倍。在张家口雨养旱作区,适宜稀植张杂谷3号杂交谷子。
Water resources are one of the main factors that restrict the agricultural development in rainfed arid areas in China. How to improve the water use efficiency of crops is the main problem nowadays. 2013 In Zhangjiakou rainfed arid area, the yield and water use efficiency (WUE) of hybrid variety Zhangzgugu 3 at different planting densities (75,000 / hm2 and 150,000 / hm2) were studied. The results showed that under the condition of adequate rainfall, the main water supply of Zhangzaguguan No. 3 came from 0 ~ 100 cm soil layer, and the average yield was 6 787.78 kg / hm2 under the condition of poor cultivation. Compared with the control, No.5 (average yield 5 518.43 kg / hm2) increased by 23.00% or more, the difference reached a significant level (P <0.05). Among them, the maximum water use efficiency was 24.10 kg / (hm2 · mm) at the planting density of 75 000 plants / hm2, which was 1.26 times of the control. In Zhangjiakou rain and drought relief area, suitable for thin planting Zhang Zigu 3 hybrid millet.