摘要
[目的]探讨四季草莓不同叶龄叶片的氮素吸收与运转规律,为提高四季草莓的生产品质提供理论和数据支持。[方法]应用15N根外追肥与示踪技术,分别对功能叶、老叶和幼叶进行叶面涂抹尿素溶液,通过检测功能叶、老叶、新叶、老茎、新茎和花果蕾等器官中的NDFF,分析其氮素吸收与转运规律。[结果]不同叶龄的叶片15N根外追肥,功能叶对15N的吸收利用率最高,幼叶最低,老叶居中。不同试验处理植株各个器官的分配率不同,追肥处理后花果蕾的分配率最低,NDFF在各个处理中最低。[结论]功能叶在植株根外追肥中起到非常重要的作用,且氮素被功能叶吸收后能较快速的运转到其他器官,提供植株所需要的营养。
[Objective] The characteristics of 15N absorption,partition and translocation in ever bearer（Fragaria ananassa duch Selva） were studied to improve the quality of strawberry.[Methods] 15N-labelled urea was daubed on old leaves,young leaves and functional leaves respectively before that were determined for analyzing the law of absorption and translocation of nitrogen.[Results] The top rate of 15N absorption and utilization was 36.9%（functional leaves）,the lowest was 31.9%（young leaves） and 32.9%（old leaves） was placed in the middle.With different treatments,the rate of 15N distribution of every organ was different.The lowest rate of 15N distribution（10.43%） and NDFF（8.94%） was in bud and fruit with functional leaves treaded.The rate of 15N distribution of every organ was low,because of limited total nitrogen nutrition.[Conclusion] In all leaves,the functional leaves played an important role in foliar fertilizer.Nitorgen that absorbed by functional leaves was moved quickly to other organs for supporting strawberry plant.
出处
《安徽农业科学》
CAS
北大核心
2011年第34期21026-21027,共2页
Journal of Anhui Agricultural Sciences
关键词
四季草莓
根外追肥
氮素
运转
Ever bearer
Foliar fertilizer
Nitrogen
Translocation
