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园艺学报 ›› 2002, Vol. 29 ›› Issue (4): 337-342.

• 研究论文 • 上一篇    下一篇

碳酸氢根和铵态氮共同对菜豆生长及养分吸收的影响

田霄鸿;李生秀;宋书琴
  

  1. (西北农林科技大学资源环境学院, 杨凌712100)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2002-08-25 发布日期:2002-08-25

Effect of Coexistence of Bicarbonate and Ammonium in Nutrient Solution onGrowth and Nutrient Uptake of Kidney Beans

Tian Xiaohong, Li Shengxiu, and Song Shuqin   

  1. (College of Resources and Environment sciences , Northwest Sci-Tech University of Agriculture and Forestry , Yangling 712100 , China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2002-08-25 Published:2002-08-25

摘要: 以菜豆为材料进行水培试验, 探讨了高浓度NH4+-N与HCO3-共存介质对菜豆生长发育及其营养吸收的影响, 结果表明: ①以HCO3--N 为主要氮源时, 菜豆生长状况最好; 以NH4+-N为主要氮源且无HCO3-存在时, 培养前期菜豆根系就发生受害现象, 叶片出现萎蔫; 但加入HCO3-后, 随着营养液中HCO3- 浓度从0 升高到13. 0 mmol/L , 菜豆长势逐渐改善, 表明HCO3-与NH4+ 以较合适的比例共存于介质中可明显减轻二者非共存对菜豆生长的抑制作用。② 同一处理, 菜豆整株对主要营养元素吸收量的次序为: N > K> P > Ca >Mg > Fe >Mn , 以NH4+2N 为主要氮源时, 随HCO3-浓度升高, 菜豆对N、P、Ca、Mn 的吸收量逐渐增大。③以NO3--N 为主要氮源, P、Fe、Mn 元素在根部出现累积, 而以NH4+-N为主要氮源时, 随HCO3-浓度增加, N、P、Ca、Mn 在根部亦有累积现象。

关键词: 水培, HCO3-, NH4+-N, 离子拮抗, 菜豆

Abstract: Solution culture was used to study the effect of different combination between ammonium and bicarbonate coexisted in the mediumon growth , nutritional element uptake by different kidney organs kidney beans. The
obtained results showed that : ①supplying nitrate nitrogen as main N source , the growth status was the best ; supplying ammonium nitrogen as main N source without bicarbonate in the nutrient solution , the roots of kidney beans were harmed during the early growth period , and the wilting phenomena of leaves took place. In nutrient solution having ammonium as main N source with addition of bicarbonate , the growth status became increasingly better with the increase of bicarbonate concentration. This showed bicarbonate and ammonium coexisting in a moderate proportion could be against the inhibition to beans growth. ②Under the same reatment , the sequence of uptake amounts of several nutrient elements by whole plants of beans were : N > K> P >Mg > Fe >Mn ; When the ammonium nitrogen as main N source in the nutrient solution , with increasing bicarbonate concentration in nutrient solution , the N , P , Ca , and Mg uptake amounts were also increased. ③Mainly supplying NO3--N in the solution favored for the accumulation of P , Fe , and Mn in the root parts , and mainly supplying NH4+-N, with increasing bicarbonate concentration in the nutrient solution , the accumulation of N , P , Ca , Mn in the roots took place.

Key words: Hydroponics experiments, Bicarbonate, Ammonium stress, Ion antagonism, Kidney beans

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