不同含氮化合物对NaCl胁迫下紫花苜蓿种子萌发特性的影响.PDF

中国农学通报 2014,30(5): 19-22 Chinese Agricultural Science Bulletin 不同含氮化合物对NaCl 胁迫下紫花苜蓿 种子萌发特性的影响 王大昊，王 旭，唐 娇，陈一民，张 义 （黑龙江大学农业资源与环境学院，哈尔滨150080） 摘 要：探讨含氮化合物对NaCl 胁迫下紫花苜蓿种子萌发及可恢复性的影响。试验共包括6 种含氮化 合物，各设8 种浓度，测定发芽率指标。结果表明：各含氮化合物处理均未表现出缓解250 mmol/L NaCl 抑制紫花苜蓿种子萌发的能力。胁迫部分缓解后，低浓度(0.625~ 10 mmol/L)处理萌发恢复较高，接近或 超出对照水平，表明盐分和含氮化合物（氮肥）在一定程度上可以共存。高浓度(20~80 mmol/L) 处理则 出现2 类情形：KNO 、NaNO 、(NH ) HPO 处理恢复萌发低，80 mmol/L 处理几乎没有萌发；而NH Cl、 3 3 4 2 4 4 NH NO 、NH H PO 均有较高的恢复萌发。结果显示盐胁迫效应与pH 关系密切，盐碱地中改善紫花苜 4 3 4 2 4 蓿生产时土壤碱性是一个值得优先考虑的限制因素。 关键词：紫花苜蓿；含氮化合物；NaCl 胁迫；种子萌发 + 中图分类号：S551 .7 文献标志码：A 论文编号：2013-0923 Effects of Various Nitrogenous Compounds on Seed Germination of Medicago sativa L. Under NaCl Stress Wang Dahao, Wang Xu, Tang Jiao, Chen Yimin, Zhang Yi (CollegeofAgriculturalResourcesandEnvironment,HeilongjiangUniversity, Harbin 150080) Abstract: The present study explored the effect of nitrogenous compounds on seed germination and recovery of Medicago sativa L. under NaCl stress. Six nitrogenous compounds were applied, each at eight concentrations. Seed germination percentage was determined. The results indicated that none of the nitrogenous compounds could alleviate the inhibitory effect of 250 mmol/L NaCl on seed germination of M. sativa. When salt stress was relieved, treatments at lower concentrations (0.625-10 mmol/L) showed higher recovery germination, near or above the control level, suggesting the possibility of nitro