Establishment of sampling techniques and standard sap NO3-N in banana using the rapid nitrate test
2007
Angeles, D.E., Philippines Univ. Los Baños, College, Laguna (Philippines). Crop Science Cluster
Rapid nitrate test using the Merkoquant test strip was applied to diagnose the nitrogen requirements of 'Lakatan' banana. The study was conducted to establish the sampling procedures, determine the standard sap N03-N level and determine its sensitivity to predict the plant's nitrogen needs. Sap NO3-N did not vary significantly along the petiole and midrib and therefore, any of their sections can be used as index tissue for sap analysis. Any section of the petiole and midrib can be used as index tissue for sap analysis. Bihourly changes of sap NO3-N levels were noted, but the highest level was obtained at 9:30 AM. The standard sap NO3-N level of 390 ppm was established from a survey of banana grown in Laguna, Batangas, Tagaytay City and Davao City [Philippines]. Validation trials to determine whether or not the standard sap NO3-N level can accurately predict yield showed negative results.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
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