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

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-DR IS)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-DR IS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.

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.