摘要
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6787．78 kg／hm2，较对照常规品种冀张谷5号（平均产量5518．43 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 is one of the most limiting factors for the agricultural development of rainfed dryland area , so how to improve water use efficiency is the main problem in this area at preesent.The changes of yield and water use efficiency of hybrid millet variety Zhangzagu No.3 under different seedling densities （ 75 000 plants /hm2 and 150 000 plants/hm2 ） in rainfed dryland area of Zhangjiakou were studied in 2013.The results showed that under abundant rainfed condition, the main water service ofZhangzagu No.3 supplied from 0-100 cm soil, the average yield of Zhangzagu No.3 could reach 6 787.78 kg/hm2 under low seedling cultivation density, while conventional variety Jizhanggu No.5 was only 5 518.43 kg/hm2, the former was 23.00% more than the latter, which reached a significant level （P＆lt;0.05） .In addition, when the seedling cultivation density was 75 000 plants/hm2, the water use efficiency of Zhangzagu No.3 could reach a maximum value of 24.10 kg/（ hm2？ mm ） , which was 1.26 times as more as conventional variety Jizhanggu No.5.The low seedling cultivation density of Zhangzagu No.3 is fit for rainfed dryland area of Zhangjiakou.
出处
《河北农业科学》
2015年第3期1-7,共7页
Journal of Hebei Agricultural Sciences
基金
国家科技支撑计划项目(2011BAD06B01)
关键词
杂交谷子
雨养栽培
稀植
水分利用效率
产量
Hybrid millet
Rainfed cultivation
Low seedling density
Water use efficiency
Yield
