摘要
在盆栽条件下研究了磷素营养与春小麦抗旱性之间的关系结果表明：施用磷肥由于对根系生长的促进，明显改善了春小麦的水分供应状况，同时，增加了束缚水含量，提高了膜稳定性和叶片耐脱水能力，且由于提高了渗透调节能力，维持了生长过程的正常进行，明显提高了春小麦的生物量和籽粒产量．虽然气孔导度的增大增加了作物的耗水，但由于施磷对失水的促进小于对产量的促进作用，因而明显提高了春小麦的水分利用效率综合分析表明：施磷可明显改善春小麦的抗旱性．
The relationship between phosphorus nutrition and brought resistance of spring wheat was studiedunder potted conditions. The results showed that the application of phosphorus could not only improve water status of spring wheat and raise net photosynthesis rate of its leaves because root growth was accelerated, but alsoraise bound water content, increase cell membrane stability and the tolerance to water loss, improve osmotic adjustment and maintaine the continuous growth . Asaresult, water use efficiency of spring wheat was raised and itsproduction was increased. All this shows that phosphorus could markedly improve drought resistance of springwheat.
出处
《应用与环境生物学报》
CAS
CSCD
1998年第2期115-119,共5页
Chinese Journal of Applied and Environmental Biology
基金
国家自然科学基金!39470430
关键词
磷素营养
抗旱性
春小麦
soil drought
phosphorus nutrition
drought resistance
spring wheat
