植物营养与肥料学报Issue(5)：1212-1220,9.DOI:10.11674/zwyf.2014.0518
荔枝叶片养分含量动态及不同比例钾、氮肥施用效应
Dynamic changes of nutrition in litchi leaves and effects of potassium and nitrogen fertilization
摘要
Abstract
Objectives]Field experiment was conducted to determine the annual changes of element contents in litchi leaves and the effects of the nitrogen ( N ) and potassium ( K ) ratio on the yield and planting benefits of litchi,aiming to provide a theoretical basis and practical guidance for fertilization management, nutrition regulation in litchi production.[Methods]The cultivar“Feizixiao” litchis,the main domestic grafted seedlings, were planted in 1995 and taken as tested material.Field experiments with different ratios of potassium over nitrogen ( K2 O/N:0.6, 0.8, 1.0, 1.2 and 1.4) were conducted in the main litchi plant region of Guangdong in the 3 growth seasons from 2009 to 2012.Litchi leaves were collected periodically to measure the contents of mineral elements.When litchis are ripe, the actual yields of litchis were weighed in the field.[Results]The nutrient contents in litchi leaves vary significantly in different growing stages.During the whole growing period, the contents of nutrient elements in litchi leaves are in order of N >K >Ca >Mg >P >S >B >Zn >Mo.The K content is highly and negatively correlated with the contents of Ca and Mg, and significantly and negatively correlated with that of Zn. The contents of Ca, Mg and Zn are positively and significantly correlated with each other.The N content is negatively and significantly correlated with the those of S and B in leaves, and the contents of S and B show significant positive correlation with each other.The content of P exhibits significant negative correlation with Ca and Si, while the contents of Ca and Si are significantly and positively correlated with each other.Under the same N application rate, the yield and planting benefits of litchi are increased at first with the increase of ratio of K2 O to N and then decreased.Litchi has the highest yield and benefit when the ratio of K2 O to N ranges from 1.0 to 1.2.[Conclusion]The ratio of K2 O to N ranges from 1.0 to 1.2 is recommended for the main litchi production areas of China.关键词
荔枝/妃子笑/矿质元素/钾氮比/产量Key words
litchi/Feizixiao/mineral elements/K2 O/N ratio/yield分类
农业科技引用本文复制引用
杨苞梅,姚丽贤,李国良,周昌敏,何兆桓..荔枝叶片养分含量动态及不同比例钾、氮肥施用效应[J].植物营养与肥料学报,2014,(5):1212-1220,9.基金项目
国家荔枝龙眼产业技术体系项目（ CARS-33）；国际植物营养研究所（ IPNI）资助项目；农业部南方植物营养与肥料重点实验室开放基金项目（TFS2011－03）资助。 （）
