%0 Journal Article %A CUI Hongyan %A HU Falong %A FANG Zisen %A NIU Junyi %T Effects of Irrigation Amount and Stage on Water Consumption Characteristics and Grain Yield of Oil Flax %D 2015 %R 10.11869/j.issn.100-8551.2015.04.0812 %J Journal of Nuclear Agricultural Sciences %P 812-819 %V 29 %N 4 %X
In order to discuss the water demand regulation of oil flax under different irrigation conditions, field experiment was conducted in 2012 and 2013 to elucidate the effects of irrigation amount and stage on the water consumption characteristics, grain yield, and water use efficiency of oil flax, which was‘Longyaza 1’. The experiment had five treatments:no irrigation during the whole growth season (represented as CK), irrgation amount was 80 mm at stem stage (T1), irrigated at stem and full flowering stage, and irrigation amount was 60 mm and 40 mm(T2), 80 mm and 40 mm(T3), respectively, irrigated at stem, squaring and full flowering stage, and irrgation amount also was 60 mm, 40 mm and 40 mm(T4), respectively. The results showed that with the increase in irrigation water amount, the total water consumption were increased, the proportion of soil water consumption amount and precipitation to total water consumption amount was reduced. However, the variation coefficient of the proportion of soil water consumption amount to total water consumption amount was significantly higher than that of precipitation to total water consumption amount, suggesting the relatively wide regulation range of soil water use efficiency.Compared with the treatment T4 (with the total irrigation amount of 140 mm), the proportion of soil water consumption amount to total water consumption amount was significantly increased by 59.37%(2012)and 52.85%(2013) in treatment T2 (with the total irrigation amount of 100 mm), which was raised the absorption and utilization of soil water. The water consumption rate (CA) and water consumption percentage (CP) of oil flax appeared as follows. First, the flowering to maturity. Second, budding to flowering. Third, stemming to budding, the stage water consumption rate in 2012 was significantly greater than that of the 2013 growing season. Grain yield was increased first and then decreased with the increase of irrigation amount, the yield and water use efficiency of T2 treatment were significantly higher than other treatments, compared with the CK treatment, increased by 40.72% to 45.90%, 11.71% to 20.50%, respectively. As far as water-saving and high-yield were concerned in the experiment, the most appropriate irrigation treatment for recommendation was the one which irrigated 60 mm at stem stage and 40 mm at full flowering stage (T2) respectively.
%U https://www.hnxb.org.cn/EN/10.11869/j.issn.100-8551.2015.04.0812