摘要
通过盆栽试验研究了苗期砷胁迫下磷用量对磷高效水稻99011和磷低效水稻99056生长以及对P、As吸收的影响。试验设3个磷水平(0、30、150mg/kg)和5个砷水平(0、25、50、100、200mg/kg)。结果表明,苗期施砷显著增加了两个水稻品种地上部及地下部砷的含量,降低了两个水稻品种的株高、分蘖数、地上部及地下部干质量;施磷不但促进了两个水稻品种的生长,而且还增加了根系对砷的吸收量。当土壤砷浓度为25mg/kg和50mg/kg时,施用30mg/kg磷抑制了两个水稻品种砷向地上部的转移,但施用150mg/kg磷却促进了砷向地上部的转移。相同的处理,磷高效水稻99011地上部干质量和根干质量均显著高于磷低效水稻99056。施砷后,在30mg/kg磷水平上磷低效水稻99056的砷转移系数最低。
A pot trial was conducted to clarify the effect of different phosphorus （P） levels on the growth, P and arsenic （As） absorption of Pefficient rice 99011 and Pinefficient rice 99056 under As stress conditions. P was applied at three rates （0, 30 and 150 mg/kg） and As at five rates （0, 25, 50, 100 and 200 mg/kg） in soil. Results showed that application of As increased shoot and root As concentration and decreased plant height, tiller number, shoot and root dry weight of the two rice varieties. Application of P increased the growth as well as the root As concentration of the two rice varieties. At 25 mg/kg and 50 mg/kg of As in soil, application of 30 mg/kg P decreased the translocation of As from roots to shoots and application of 150 mg/kg P increased the translocation of As from roots to shoots of the two rice varieties. Under the same treatment, shoot and root dry weight of Pefficient rice 99011 were significantly higher than those of Pinefficient rice 99056. Under the As treatment, the translocation factor of As in Pinefficient rice 99056 minimized at 30 mg/kg P treatment.
出处
《中国水稻科学》
CAS
CSCD
北大核心
2013年第3期273-279,共7页
Chinese Journal of Rice Science
基金
国家自然科学基金资助项目(40701076)
中央高校基本科研业务费专项资金资助项目(2011PY110)
关键词
磷
砷
水稻
砷转移系数
phosphorus arsenic rice arsenic translocation factor
