充足范围法和修正诊断施肥综合法在荔枝营养诊断中的比较

Comparison Between Sufficiency Range Method and Modified Diagnosis and Recommendation Integrated System in Nutrition Diagnosis of Litchi

摘要: 根据深圳市4个荔枝丰产园制定了糯米糍荔枝叶片N、P、K、Ca、Mg、B、Zn 7个元素的标准值范围及其相应比值参比值等参数，运用充足范围法（标准值法）与修正诊断施肥综合法（M-DRIS）对深圳市2个低产园糯米糍N、P、K、Ca、Mg、B、Zn的丰缺状况进行了诊断．结果表明，与充足范围法相比，M-DRIS不但可以衡量养分相对平衡状况，还能够提供施肥次序和养分潜在缺乏的信息，为荔枝平衡施肥提供参考依据．

Abstract: The standard ranges,nutrient-ratio reference values and related parameters were put forward by analyzing Nuomici litchi leaf samples from 4 high-and-stable yielding orchards.Sufficiency range method(SRM,i.e.,standard value method) and modified diagnosis and recommendation integrated system(M-DRIS) were used to diagnose the N,P,K,Ca,Mg,B,Zn sufficient and deficient status of Nuomici litchi(Litchi chinensis Sonn) from 2 low-yielding orchards in Shenzhen City.Compared with SRM,M-DRIS not only showed relative balance status among nutrients,but also provided the information of the fertilizer application order and potential nutrient deficient.Thus M-DRIS could offer better foundation for balanced fertilizer application in litchi production.