SOIL PROFILE CHARACTERISTICS AND LEAF NUTRIENT STATUS IN RELATION TO SOIL NUTRIENT STATUS OF MANGO ORCHARDS
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Title |
SOIL PROFILE CHARACTERISTICS AND LEAF NUTRIENT STATUS IN RELATION TO SOIL NUTRIENT STATUS OF MANGO ORCHARDS
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Creator |
PRASAD, K. R. K
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Contributor |
RAMALINGAM, C.S
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Subject |
SOIL, PROFILE, CHARACTERISTICS, LEAF, NUTRIENT, STATUS, RELATION, SOIL NUTRIENT, STATUS, MANGO ORCHARDS,
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Description |
With a view to surveying the soil profiles of mango orchards and to correlate the soil nutrient status with the corresponding leaf nutrient status, the present investigation was carried out in mango orchards of Fruit Research Station, Sangareddy, Andhra Pradesh, during 1986-87. The study was also aimed at finding out deficiency of nutrient elements, if any. For this purpose 30 soil profiles were dug, with half of the profiles dug near the tree and the remaining half away from the tree, from five blocks where cultivars Benishan, Royal Special, Mahmooda Vikarabad, Navaneetham and Manjira were being grown. From each profile four soil samples at 0-25, 25-50, 5Q-75 and 75-100 em depths were collected and the leaf samples were collected simultaneously from the trees near to which soil profiles were dug. The soil samples were analysed for physico-chemical characteristics and available N,P2o5 and K2o, Ca, Mg and available Fe, Cu, Mn and Zn contents. Similarly leaf samples were also analysed for the above nutrient elements. The results showed that the texture of the soil varied from sandy l9am to clay with no salinity problem and low to medium organic carbon status, while the soil reaction was neutral to slightly alkaline. The soils were found to be low to medium in available N content~ poor in available P2o5 content~ medium in available K2o content~ high in Ca and Mg content~ above marginal in available Fe, Cu and Mn contents and deficient in available Zn content. Regarding distribution of nutrients at different depths, the surface soil (0-25 em) .. contained significantly higher amounts of soil N, P2o5, Ca, Fe and Cu contents than did the remaining depths. However, in case of soil Mg content, the lower depths were found to have higher content than the surface soil and in case of soil K2o, Mn and Zn contents, there were no significant differences among the depths. Slightly higher values were recorded in blocks two and four when compared to other blocks for soil N, K2o, Ca and Mg, while the reverse was true for soil :P2_05, Fe, Cu, Mn and Zn contents. With reference to the nutrient status of the soil in relation to the proximity to the mango tree, it was found that the soil samples collected away from the tree had significantly higher soil N, Ca, Mg, Fe and Zn contents than the soil samples collected near the drip region of the tree. ~owever, there were no significant differences between these two types of samples with respect to soil P2o5 , K2o, CU and Mn contents. Regarding leaf nutrient status of the samples surveyed, it was found that almost all the leaf samples contained sufficient amounts of all the nutrients except Zn content, with only a few exceptions. However, the Zn status of mango leaves was in deficient range of 8.7 to 15.7 ppm, with a mean value of 11.6 ppm. The mango cultivars under study were statistically an par with one another in respect of leaf N, P, However, the cultivars were K, Ca, Mg, Cu and Zn contents. found to differ significantly regarding leaf Fe and Mn contents, with cultivars Manjira, Mahmooda Vikarabad and Benishan recording significantly higher mean leaf Fe and Mn contents than cultivars Navaneetham and Royal Special. In respect of the relationship of soil nutrient status with the corresponding leaf nutrient status in mango orchards it was found that there were no significant correlations between soil nutrient status at four depths and leaf nutrient status for N and Zn nutrients. However, soil nutrient status at the four depths was significantly correlated with the corresponding leaf nutrient status in case of Ca, Mg and CU nutrients. Similarly sign:~icant positive correlations were noticed between soil P 2o5 at 0-25 em depth and leaf P content; soil K2o at 0-25 and 25-50 em depths and leaf K content. Typical Zn deficiency symptoms were observed in almost all the mango cultivars investigated at F.R.S., Sangareddy. The symptoms were more pronounced in the case of cultivars Benishan aoo Navaneetham. The deficiency symptoms are in confirmity with those reported by many authors and also with the deficient range of leaf Zn content obtained in all the cultivars in the present study. |
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Date |
2016-07-30T11:41:20Z
2016-07-30T11:41:20Z 1988 |
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Type |
Thesis
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Identifier |
http://krishikosh.egranth.ac.in/handle/1/70241
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Language |
en
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Relation |
D2916;
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Format |
application/pdf
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Publisher |
ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY, RAJENDRANAGAR, HYDERABAD
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