| 石灰性土壤中油菜根际磷的化学动态及生物有效性 |
| |
| 引用本文： | 曹一平,崔健宇.石灰性土壤中油菜根际磷的化学动态及生物有效性[J].植物营养与肥料学报,1994,0(1):49-54. |
| |
| 作者姓名： | 曹一平 崔健宇 |
| |
| 作者单位： | 1.北京农业大学 100094 |
| |
| 摘 要： | 采用网膜分隔三室栽培系统研究了供磷水平不同的石灰性土壤中,油菜根际磷的各种化学组分的动态分布特征。发现在正常供磷水平下油菜根际范围内Olsen-P,Ca2-P均处于亏缺状态,表明这两种形态的磷是油菜吸磷的主要给源。而在土壤磷极度缺乏条件下,根际Ca8-P和Al-P呈现亏缺状态,该二种磷成为油菜吸磷的给源,这时Olsen-P和Ca2-P反而呈现均匀分布。这一结果表明,在严重缺磷胁迫条件下,油菜根际的难溶性磷(Ca8-P和Al-P)可以被活化而为植物利用,成为生物有效磷。这是油菜抗低磷胁迫根系适应反应的间接证明。
|
| 关 键 词： | 油菜 根际 磷 生物有效性 动态 石灰性土壤 |
PHOSPHOROUS DYNAMIC AND BIOLOGICAL AVAILABILITY IN RHIZOSPHERE OF RAPE SEEDLINGS GROWN ON CALCAREOUS SOIL |
| |
| Cao Yiping Cui Jiaayu.PHOSPHOROUS DYNAMIC AND BIOLOGICAL AVAILABILITY IN RHIZOSPHERE OF RAPE SEEDLINGS GROWN ON CALCAREOUS SOIL[J].Plant Nutrition and Fertilizer Science,1994,0(1):49-54. |
| |
| Authors: | Cao Yiping Cui Jiaayu |
| |
| Institution: | 1.Beijing Agricultural University;100094 |
| |
| Abstract: | Phosphorous dynamic and distribution in rhizosphere of rape seedlings was studied in a three-compartment-pot separeted by net on the calcurous soil with three P levels. Olsen-P and Ca (Ⅱ) -P depleted occurred in the rhizosphere at normal phosphorous level. Indicating that those two forms of phosphorous were the main P source for rape. However, where soil at very low P level, Ca (Ⅷ) -P and A1-P depleted in rhizosphera and became main P source to rape, and Olsen-P and Ca (Ⅱ) -P were uniform distributed in rhzosphere of rape. The results above indicated that sparingly-soluble phosphorous had been mobilized and became bioavailable in rhizosphere of rape seedlings. |
| |
| Keywords: | |
| 本文献已被 维普 等数据库收录！ |
| 点击此处可从《植物营养与肥料学报》浏览原始摘要信息 |
| 点击此处可从《植物营养与肥料学报》下载免费的PDF全文 |
|
