荒漠草原区人工柠条叶片的氮磷化学计量特征  

Leaf Nitrogen and Phosphorus Stoichiometry Feature of Artificial Caragana intermediain Desert Grassland

作　　者：陈娟[1] 璩向宁[2] 王磊[2] 

机构地区：[1]宁夏大学西北土地退化与生态恢复国家重点实验室培育基地,宁夏银川750021 [2]宁夏大学西部生态与生物资源开发联合研究中心,宁夏银川750021

出　　处：《贵州农业科学》2013年第12期68-71,共4页Guizhou Agricultural Sciences

基　　金：973计划前期研究专项"荒漠草原农牧系统稳定性与维持机理研究"(2012CB723206);宁夏高等学校科学研究重点项目"基于光谱特征的柠条信息量化反演技术研究"[宁教高(2011)263-6];国家"十二五"科技支撑计划课题"退化荒漠草原人工改良与资源循环利用技术试验与示范"(2011BAC07B03)

摘　　要：为了给宁夏盐池县柠条资源的经济利用提供依据,测定了不同生长年限和平茬年限柠条叶片的氮磷含量,分析了柠条的个体水平生态化学计量学特征。结果表明:1)人工柠条叶片的氮质量浓度和磷质量浓度之间呈显著的正相关关系。2)不同生长年限柠条叶片的氮、磷质量浓度和氮磷比有显著差异性。3)不同平茬年限柠条叶片的氮、磷质量浓度和氮磷比有显著差异性。4)荒漠草原区人工柠条生长受磷限制。结论:对多年生长柠条适当地进行平茬处理可以提高植物叶片氮、磷含量,提高其适口性。The ecological stoichiometry feature of C. intermedia was analyzed by determining l＂q anti V content of C. interrnedia leaves with different growing years and stumping years to provide a reference for economical utilization of C. intermedia in Yanchi county of Ningxia. The results showed that. 1） there was a significant positive correlation between N and P mass concentration in artificial C. intermedia leaf~ 2） there was significant difference between N, P mass concentration and N/P ratio in artificial C. intermedia leaves with different growing years~ 3） there was significant difference between N, P mass concentration and N/P ratio in artificial . intermedia leaves with different stumping years~ 4） growth of artificial C. interrnedia in desert grassland was inhibited. In conclusion, the rational stumping treatment to C. intermedia with some growth years can increase N and P content of C. intermedia leaf and improve the palatability of C. interrnedia leaf.

关 键 词：柠条 荒漠草原 生态化学计量学 氮磷比 氮 磷 

分 类 号：S816.42[农业科学—饲料科学]