摘要
探讨红阳猕猴桃(Actinidia chinensis cv.‘hongyang’)树体养分限制因子,为推动猕猴桃果园科学合理施肥提供参考。采用DRIS指数诊断法对四川都江堰地区红阳猕猴桃(Actinidia chinensis cv.‘Hongyang’)进行叶片营养诊断研究。结果表明,红阳猕猴桃在不同时期叶片各养分元素变化存在差异,且随季节变化叶片N、P、K含量均呈现逐渐减低趋势。不同时期DRIS确定的重要诊断参数不同。诊断结果显示,不同时期高产园和低产园的养分限制因子存在差异。在4月和6月份,相对于N和P,K是影响产量的最主要限制因子,但在4月份,K相对N、P不足,而在6月,K相对N、P过量。在8月份,P成为最需要的元素,低产果园较高产果园更需要。研究表明,可以采用DRIS方法对红阳猕猴桃在不同生长阶段的养分状况进行诊断。猕猴桃果园施肥时,不仅要注意各个时期肥料的均衡配比,还要考虑肥料的最佳施入方式,以最大程度提高肥料利用率。
In order to provide a reference for promoting scientific and rational fertilization of kiwifruit orchards,the nutrient limiting factors of Actinidia chinesis cv ‘Hongyang’ were studied through leaf nutrient diagnosis by DRIS （Diagnosis and Recommendation Integrated System） index.The results showed that leaf nutrient contents were significantly different at different growing stages.N,P and K contents in the leaves tended to decrease gradually with the seasons.Important parameters of DRIS were changed in different growing periods.Diagnostic results showed that the primmry nutrient limiting factors at the high-yield and low-yield orchards were different in different periods.In April and June,in contrast to N and P,K content was the main limiting factor affecting the yield.In April,K was insufficient while in June,K was excessive.In August,P became the most sensitive nutrient.Low-yielding orchards needed more P than high-yielding orchards.It is indicated that leaf nutrition diagnose of Actinidia chinesis cv ‘Hongyang’ with DRIS could be performed at different growing stages.When applying fertilizer to Kiwifruit orchard,both the fertilization ratio and the application method should be took into account to maximize use efficiency of fertilizer.
出处
《湖北农业科学》
北大核心
2014年第18期4344-4348,共5页
Hubei Agricultural Sciences
基金
国际植物营养研究所(IPNI)中国项目(IPNI-HB-34)
都江堰市院地合作科技项目(Y239321I03)
关键词
红阳猕猴桃
都江堰
营养诊断
DRIS
Actinidia chinesis cv.‘Hongyang’
Dujiangyan
nutrient diagnosis
DRIS
