Plant tissue testing as a guide for diagnosing nutrient disorders in the litchi growing orchards of Uttarakhand
2010
Singh, P. K. | Singh, S. K. | Singh, Narendra | Lal, R. L.
Leaf analysis has been successfully used as a guide in diagnosing nutritional problem and as a basis for fertilizer recommendation in fruit tree in many countries. However, little information is available on leaf nutrient standard for litchi which is a native of china. An alternative approach to the traditional method of developing leaf nutrient standards is to survey high productive orchard and assume that nutrients concentration in these orchards are optimal. This technique was used to establish tentative leaf nutrients concentration standard for litchi in Uttarakhand. Nitrogen status in leaf sample was lowest (1.19%) in Pithoragard belt, whereas phosphorus content was particularly low in Dehradun (0.16%) and Pithoragarh (0.13%) litchi belt. As regards to potassium content, it was also very low in Dehradun (0.67%), Pithoragarh (0.67%) and Haridwar (0.95%). Very low sulphur content in litchi orchard of Pithoragarh area seems to be a major concern. As regards to micronutrients concentration, Zn content was combatively lower in Ramnagar (17ppm) and Kichha (18ppm) area while Cu status seems to cause problem in near future. Iron was sufficient in the entire orchard while Mn status was comparatively lower in Ramnagar and Kichha area. Poor nutritional status of leaves in Litchi orchards primarily in hill areas seems to be a cause of concern and warrant proper nutrient management strategy. A tentative leaf nutrients standard proposed for litchi orchard of Uttarakhand is 1.78%, 0.25%, 2.68%, 0.16%, 26ppm, 13ppm, 179ppm and 13ppm for N,P,K,S,Zn,Cu,Fe nad Mn respectably.
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Эту запись предоставил Indian Council of Agricultural Research