Study on fertigation scheduling in Kinnow mandarin
KrishiKosh
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Title |
Study on fertigation scheduling in Kinnow mandarin
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Creator |
UWISIZE MARIE GRACE
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Contributor |
V.B. Patel
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Subject |
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Description |
T-8524
A field experiment was conducted on Kinnow mandarin to find out effect of fertigation on growth, physiological and biochemical parameters, nutrient status in soil and leaf, yield and fruit quality. The treatments were T1: Ring irrigation with standard N, P, K as soil application; T2: Drip with 100 per cent N, P, K as soil application; T3: Fertigation with 100 per cent N and P, K as soil application; T4: Fertigation with 75 per cent N and P, K as soil application; T5: Fertigation with 50 per cent N and P, K as soil application; T6: Fertigation with 100 per cent N, P, K; T7: Fertigation with 75 per cent N and 100 per cent P, K fertigation and T8: Fertigation with 75 per cent N, P, K. The experiment was conducted on 5- year-old plants at Todapur Orchard, IARI, New Delhi during 2010-11. Fertigation had significant effect on vegetative growth parameters of trees over drip and ring irrigation systems or soil application. Fertigation with 100 per cent N, P, K (T6) had positive effects in improving photosynthetic rate (8.49 μmol m-2s-1), transpiration rate (0.77 μmol m-2s-1), stomata conductance (0.34 μmol m-2s-1) and relative water content (94.54%) compared to other treatments. Higher chlorophyll content (2.01 mg g-1 FW), carotenoids (1.84 mg g-1 FW) and total leaf sugars (48.30 mg g-1 FW) were recorded in fertigated plants compared to soil application of fertilisers. The maximum number of fruits per tree (160) and yield (12.08 t/ha) was recorded under fertigation with T6; however it did not influence the fruit weight significantly. Fertigation had no significant effect on number of seeds per fruit. The maximum juice content (48.59%), TSS (9.46 0Brix), acidity (0.94%), ascorbic acid (45.03 mg/100 ml of juice) and total sugars (8.20%) contents were found under fertigation with T6. While, higher TSS: acid ratio (11.48) was recorded with treatment having ring method of irrigation and soil application of fertilizers, while reducing sugars with fertigation with 50 per cent N and P, K as soil application. Fertigation treatments resulted in significant variation in leaf nutrient content in the leaves of Kinnow during the both sampling intervals. Higher nitrogen (2.85%), phosphorus (0.17%), manganese (61.33 ppm) and copper (14.85 ppm) were recorded with fertigation with 100 per cent N, P, K, while higher potassium (1.84%) and zinc (64.83 ppm) was in leaves of the plants fertigation with 50 per cent N and 100 per cent P, K as soil application. There was no significant effect of fertigation on leaf iron content during both sampling stages. Available nitrogen, phosphorus and potash distribution in soil had shown a decreasing trend with increasing soil depths (0-15 to 30-60 cm) regardless of the treatments. Fertigation resulted in increase in concentrations of both macro and micro nutrients near the active root zone (0-15 and 15-30 cm depths), exhibiting a radial decrease with increasing horizontal distance from the point of application, i.e. higher at 50 cm and lower at 100 cm distance from the trunk. The fertigation with higher amount of fertilizers retained in the soil at the harvest were found in ring irrigation with soil application compared to fertigation treatment. Hence, fertigation with 75 per cent N and 100 per cent P & K (450g N, 300g P and 400 g K) can be recommended for application in three splits during February (225N:75P:100K), Apri1(112.5N: 112.5P: 150 K) and August (112.5N: 112.5P: 150 K) for young Kinnow orchards. |
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Date |
2016-12-02T09:37:55Z
2016-12-02T09:37:55Z 2011 |
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Type |
Thesis
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Identifier |
http://krishikosh.egranth.ac.in/handle/1/88793
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Format |
application/pdf
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Publisher |
IARI, DIVISION OF FRUITS AND HORTICULTURAL TECHNOLOGY
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