CHEN Guo-xing,XIA Xuan,LYU Shu-cai,et al.Effects of Phosphorus Nutrition on Photosynthesis and Yield of Soybean by Sanding Method[J].Soybean Science,2017,36(04):575-582.[doi:10.11861/j.issn.1000-9841.2017.04.0575]
砂培法模拟磷素营养水平对大豆光合作用和产量的影响
- Title:
- Effects of Phosphorus Nutrition on Photosynthesis and Yield of Soybean by Sanding Method
- 文献标志码:
- A
- 摘要:
- 以大豆品种黑农48为试验材料,采用砂培盆栽法,通过在大豆生育期间淋浇不同磷素水平的营养液,研究了施磷素水平对大豆植株光合作用及产量的影响。结果表明:随着大豆的生长CO2的吸收速率、叶面积、光合速率逐渐增大,CO2的吸收速率和光合速率基本在R5时期达到最大值,之后趋于逐渐下降的趋势,呈现单峰曲线变化。CO2的吸收速率、叶面积随着磷素营养水平的增加逐渐增大,但当磷素营养水平达到21 mg·L-1时,再提高磷素水平对其已无明显作用。低磷胁迫(P1处理)大豆生育中前期的光合速率明显降低,低磷胁迫后再供给较高的磷素营养对大豆光合速率有一定的激活效应,使光合速率增大。大豆株高、粒数、节数和产量都随着磷素营养水平的上升呈现逐渐增高的趋势,当磷素营养水平达到21 mg·L-1时,再增加磷素营养对大豆株高和产量已无影响。低磷胁迫后再供给较高的磷素营养水平对大豆产量有一定的恢复作用。在营养生长阶段,如果缺磷极易减产,低磷胁迫时间越长产量越低。
- Abstract:
- In order to clear the effect of phosphorus application on the photosynthesis and yield of soybean, Heinong 48 was taken as material and different phosphorus levels nutrient solutions were sprayed during growth period under sand cultivation condition. The results showed that the CO2 absorption rate, leaf area and photosynthetic rate increased with the growth of soybean.The CO2 absorption rate and photosynthetic rate reached the maximum at R5 stage, and then gradually decreased, showed a single peak curve.The CO2 absorption rate and leaf area of soybean increased with the increase of phosphorus nutrient level. However, when the phosphorus level reached 21 mg·L-1, the increase of phosphorus level had no significant effect.The photosynthetic rate of soybean during early growth stage was significantly decreased under low P stress (P1 treatment), The higher P supply after low P stress had a certain effect on the photosynthetic rate of soybean, and the photosynthetic rate increased. The plant height, the number of grains, the number of nodules and the yield of soybean increased with the increasing of phosphorus nutrient level. When the phosphorus level reached 21 mg·L-1, the increase of phosphorus nutrition had no effect on plant height and yield of soybean. Phosphorus supply after high phosphorus stress could restore the soybean yield to some extent. In the vegetative growth stage, if the phosphorus- deficiency the yield was very easy to cut, and the longer the phosphorus stress, the lower the yield.
参考文献/References:
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备注/Memo
基金项目:国家“十二五”科技支撑计划( 2014BAD11B01) ; 黑龙江省科技攻关项目(GA14B101)。