印度棗葉片營養診斷方法之建立

The Establishment of Nutrient Concentration Standard of Diagnosis for Indian Jujube (Zizyphus Manuritiana Lam)

林景和(Ching-Ho Lin)

《高雄區農業改良場研究彙報》 14卷3期 (2003/12) Pp. 48-58

https://doi.org/10.6958/RBKDAIS.200312.0048

摘要

本試驗探究供印度棗營養診斷之葉片的適當採樣部位、時期及訂定其適宜要素濃度，建立營養診斷方法，以供推薦果農施肥參考。試驗於10處管理良好棗園，按前人相關研究以其中段枝條之葉片（末稍後第3－10全展葉）為採樣對象，但將其分前段（末稍後第4－5全展葉；N-4-5）和後段（末稍後第7－8全展葉；N-7-8）比較各要素濃度，以利採樣簡化參考。結果顯示，前段和後段中位葉各要素濃度雖多數月份各要素濃度無顯著差異，但氮或磷濃度二者有些月份仍有顯著差異，因此，為減少採樣差異，採樣部位仍以中段枝條之全部葉片為宜。由養分濃度變化結果發現，無論N-4-5或N-7-8葉，其各要素濃度於9－10月間變化較小，即相對穩定，可做為葉片營養診斷採樣適期，但為能及早調整施肥，暫定九月底為最適當採樣期，並將九月份N-4-5和N-7-8葉各要素濃度值計算，利用Kim（1985）方法，求取標準值（standard value；SV）及標準偏差（standard deviation；SD），以SV ± SD值為暫定葉片各要素濃度適宜範圍，分別為N = 2.84 ± 0.56%、P = 0.28 ± 0.04%、K = 2.02 ± 0.40%、Ca= 1.40 ± 0.34%、Mg = 0.30 ± 0.05%、B = 38 ± 6 mg kg^(-1)、Mn = 73 ± 32 mg kg^(-1)、Fe = 239 ± 74 mg kg^(-1)、Cu = 22 ± 15 mg kg^(-1) 及Zn = 129 ± 93 mg kg^(-1)。

關鍵字

印度棗 ； 營養診斷

並列摘要

The object of this study was to establish the nutrient diagnostic standard of Indian jujube (Zizyphus Manuritiana Lam) by determining the proper time, leaf position for sampling and creating the appropriate leaf nutrient concentration. The study was conducted at 10 well-managed orchards by sampling mid-shoot's leaves and being analyzed at its main growth stages. Leaves of mid-shoot were also divided into two parts, N-4-5 and N-7-8, to compare their nutrition difference, and to study the possibilities of simplifying samples collection. The results show that nutrient concentration of the front part leaves at mid-shoot has no significant differences with that of back part leaves in most tested months. However, in some months there is difference in nitrogen or phosphorus concentration between front part leaves and back part leaves of the same mid-shoot. Therefore, all leaves of a mid-shoot would be better for nutritional diagnosis. September is the appropriate month for leaf sampling because there are less changes at the period, and the appropriate concentrations of leaf nutrients were calculated by its standard values (SV) and standard deviations (SD). They are N = 2.84 ± 0.56%, P = 0.28 ± 0.04%, K = 2.02 ± 0.40%, Ca = 1.40 ± 0.34%, Mg = 0.30 ± 0.05%, B = 38 ± 6 mg kg^(-1), Mn = 73 ± 32 mg kg^(-1), Fe = 239 ± 74 mg kg^(-1), Cu = 22 ± 15 mg kg^(-1) and Zn = 129 ± 93 mg kg^(-1).

並列關鍵字

Zizyphus Manuritiana Lam. ； nutrient diagnosis