The Journal of Research ANGRAU

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PRASAD and PRASADINI respectively. In the subsequent rabi, the crop removed 38, 33 and 65 kg N ha -1 at the respective stages (Table 2). In kharif 2006, rice removed 24 kg N ha -1 at tillering, 40 kg at panicle initiation and 40 kg N ha -1 at harvesting stage of the crop in T 2 . In the rabi season, it removed 29, 31 and 27 kg ha -1 . The application of 50 % recommended dose of fertilizers continuously in the kharif and rabi season, significantly enhanced the quantity of N removed by the crop at every stage of its growth. This trend improved with increase in the quantity of nutrients applied upto the optimum schedule. The integrated supply of nutrients by substituting 25% N fertilizer with glyricidia and application of 75 % recommended dose of fertilizers in kharif significantly increased the uptake of nitrogen at tillering both in kharif and rabi during two years. b. Phosphorus The uptake of this nutrient increased from 1.0 kg at tillering to 4.4 kg at panicle initiation and further to 8.0 kg ha -1 at harvesting stage of the crop during kharif 2005 (Table 3). The uptake of the nutrient was increased by the application of fertilizers in different proportions during kharif and rabi season. The adoption of integrated nutrient management options by substituting 50 % N fertilizer with FYM, paddy straw or glyricidia appreciably increased the P uptake compared to the effect of chemical fertilizers applied at recommended dose. The substitution of 25 % N fertilizer with any one of these three organic sources in the kharif season and application of 75 % recommended dose of fertilizers in the rabi season also showed similar results. c. Potassium Rice removed more Potassium in response to the application of different levels of fertilizers in kharif and rabi season and their integration with the organic source of nutrients (Table 4). The unfertilized crop removed 32, 48 and 66 kg ha -1 in kharif and 38, 62 and 71 kg K ha -1 in rabi at tillering, panicle initiation and harvesting stage of the crop during 2005-06. The application of 50 % recommended dose of fertilizers in the kharif season increased the uptake significantly to 38, 77 and 71 kg K ha -1 at the respective stages of crop growth. The application of 50 % recommended dose of fertilizers in the rabi season also increased the uptake significantly to 49, 70, 114 kg K ha -1 . These trends repeated during the second year also. A large quantity of 60, 88 and 84 kg K ha - 1 in kharif and 62, 84 and 158 kg K ha -1 was removed in rabi during the first year (2005-06) by the application of recommended dose of fertilizers both in the kharif and rabi season. The uptake at tillering was 61 kg ha -1 in kharif 2006 and 63 kg ha -1 in rabi. The uptake was 61, 82 and 63 kg ha -1 at tillering, panicle initiation and harvesting in kharif while the crop removed 63, 82 and 100 kg ha -1 K during corresponding stages in the rabi seasons during 2006- 07 in response to this optimum fertilizer schedule to rice-rice crop sequence. The integrated supply of nutrients by substituting 50 % N fertilizer either with FYM, paddy straw or glyricidia in the kharif season and application of recommended dose of fertilizers in the rabi season did not improve the uptake of K by rice compared to the crop supplied with nutrients continuously through the recommended dose of fertilizers. The role of any of these organics to substitute 25 % N fertilizer in the kharif season and application of 75 % recommended dose of fertilizers in the rabi season was also not distinct to significantly increase the uptake of K compared to rice grown with fertilizers alone. B. Micronutrients a. Zinc The application of fertilizers with organic source of nutrients activated the crop to remove large quantity of Zn from the soil. The results showed that a low quantity of 29.2 g Zn was removed at tillering, 56.5 g at panicle initiation and 88.3 g ha -1 at harvesting stage of rice in the kharif season while the uptake was 44.6, 53.7 and 77.93 g ha -1 from the unfertilized soil during the first year (Table 5). The application of 50 % recommended dose of fertilisers continuously in kharif and rabi season to the sequence crops significantly increased the uptake of this nutrient throughout the crop growth period. The crop was estimated to remove 43.6, 95.1 and 135.6 g Zn ha -1 in kharif and 48.6, 85.5 and 160.4 g ha -1 in rabi at tillering, panicle initiation and harvesting during the first year. It removed 28.3, 63.5 and 174.9 g Zn ha -1 in kharif and 40.6, 75.74 and 146.1 g ha -1 in the rabi season during the three corresponding growth 10
NUTRIENT UPTAKE BY RICE CROP UNDER LONG TERM INM stages of crop in the second year. The uptake of this micronutrient in general tended to increase with the fertilizer schedule upto the optimum. Rice fertilized with the recommended level of nutrients through the fertilisers removed a large quantity of 50.1, 112.1 and 210.7 g Zn ha -1 in kharif and 57.2, 104.3 and 255.4 g Zn ha -1 in rabi at tillering, panicle initiation and harvesting stages respectively. During the second year rice removed 36.1, 92.2 and 250 g Zn ha -1 in kharif season and 46.3, 101.6 and 174.4 g ha -1 in the rabi season. The substitution of 50 % N fertilizer in kharif and application of recommended dose of fertilizers in rabi significantly increased the uptake of the micronutrient throughout the crop growing period compared to the supply of nutrients continuously through the chemical fertilizers only during the second year. The substitution of 50% N fertilizer with glyricidia in kharif and application of recommended dose of fertilizers in the rabi season was the best nutrient management strategy. It enabled the crop to remove significantly more quantity of Zn consistently at every stage of crop growth during kharif and rabi during the two year crop sequence. The substitution of 25 % N fertilizer with glyricidia in kharif and application of 75 % recommended dose of fertilizers in rabi was also superior to the complete dependence on chemical fertilizers. However, the uptake of Zn by this treatment was not significantly different at panicle initiation in the first year and at harvest in the second year. b. Copper Rice removed 4.90, 10.29 and 19.22 g ha -1 Cu in kharif and 7.57, 9.32 and 14.94 g ha -1 in rabi at tillering, panicle initiation and harvesting stage from the soil mineralized nutrients without the external supply during 2005-06 (Table 6). The uptake was 4.14, 8.93 and 23.61 g Cu ha -1 in the kharif season while it was 5.08, 8.06 and 10.71 g ha -1 in the rabi season during the second cycle of the crop sequence. The fertilizer application triggered the uptake of this micronutrient. The crop fertilized with 50 % recommended dose of fertilizers invariable removed significantly larger quantity of Cu ha -1 throughout the growth period. The dressing of soil with optimum fertilizer schedule for rice in kharif and rabi season maximized the uptake of Cu compared to relatively high level of farmers schedule. Rice removed 8.86, 19.92 and 44.75 g Cu ha -1 in kharif while it removed 9.30, 18.30 and 54.37 g Cu ha -1 in rabi during 2005- 06. Similarly, maximum uptake of 6.00, 15.26 and 52.82 g Cu ha -1 was recorded at tillering, panicle initiation and harvesting stage in kharif while it was 7.56, 17.28 and 38.47 g ha -1 in rabi during 2006-07. The substitution of 50 % N fertilizer in kharif with FYM, paddy straw or glyricidia and the application of recommended level of fertilizers in rabi were not significantly superior to enhance the uptake of this micronutrient significantly compared to the supplement of nutrients entirely through chemical fertilizers. The substitution of 25 % N fertilizer with any of the three organic sources in kharif and application of 75 % recommended dose of fertilizers in the rabi season were also not distinguished as superior nutrient management practices to fertilizer treatments. c. Iron The uptake of nutrients was low by growing rice in sequence on the native soil fertility without external input of organic or inorganic source of nutrients in the kharif season. The crop removed 156.9, 308.9 and 399.2 g Fe ha -1 at tillering, panicle initiation and harvesting during kharif 2005 (Table 7). In the subsequent rabi, rice removed 251.3, 302.9 and 318.9 g ha -1 Fe. The application of fertilizers increased the uptake of this nutrient. The uptake was significantly more even by the application of 50 % recommended dose of fertilizers continuously in the kharif and rabi season. The crop fertilized with 50 % recommended dose of nutrients removed 152.2, 314.2 and 984.3 g Fe ha -1 in kharif and 223.4, 461.1 and 769.5 g Fe ha -1 in the rabi season. The uptake of this micronutrient further increased with the level fertilizer application to a maximum upto the recommended dose. The substitution of 50 or 25 % N fertilizer with FYM in the kharif season was beneficial. It increased the uptake of Fe significantly more at tillering stage of the crop both in kharif and rabi 11
Page 1 and 2: 1
Page 3 and 4: CONTENTS PART I : PLANT SCIENCE Eff
Page 5 and 6: J.Res. ANGRAU 41(1) 1-4, 2013 EFFEC
Page 7 and 8: EFFECT OF FOLIAR APPLICATION OF NPK
Page 9: J.Res. ANGRAU 41(1) 5-13, 2013 NUTR
Page 13 and 14: NUTRIENT UPTAKE BY RICE CROP UNDER
Page 19 and 20: LAKSHMI et al Fig 1. Changes in C/N
Page 21 and 22: LAKSHMI et al Changes in C/N ratio
Page 23 and 24: LAKSHMI et al Table 3. Changes in h
Page 25 and 26: J.Res. ANGRAU 41(1) 20-29, 2013 INF
Page 27 and 28: PRASAD and PRASADINI of bulk densit
Page 29 and 30: PRASAD and PRASADINI to as high as
Page 31 and 32: PRASAD and PRASADINI Table 4 . Infl
Page 33 and 34: PRASAD and PRASADINI Table 8. Influ
Page 35 and 36: J.Res. ANGRAU 41(1) 30-38, 2013 GEN
Page 37 and 38: VEMANNA et al The range in mean val
Page 39 and 40: VEMANNA et al grain yield per plant
Page 41 and 42: VEMANNA et al 41
Page 43 and 44: VEMANNA et al Singh, S. P and Khan,
Page 45 and 46: RAMANA et al RESULTS AND DISCUSSION
Page 47 and 48: J.Res. ANGRAU 41(1) 42-46, 2013 A S
Page 49 and 50: RAJANNA et. al. Table 2. Reasons fo
Page 51 and 52: RAJANNA et al the present findings
Page 53 and 54: NARASIMHA et al Table 1. Proximate
Page 55 and 56: NARASIMHA et al Maynard, L., Lossli
Page 57 and 58: RAMANA et al with small follicles m
Page 59 and 60: RAMANA et al Characteristics of fol
Page 61 and 62:
Research Notes J.Res. ANGRAU 41(1)
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KIRTHY et al Akhtar et al., 2008; S
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KIRTHY et al El Gharras H. 2009. Po
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SANDYARANI et al Weed parameters li
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SANDYARANI et al Table 2. Influence
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KUMAR et al Table 2. Effect of seed
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DEEPAK et al Table 2 Price spread a
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YAMINI et al Table 3. Estimates of
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YAMINI et al coupled with high per
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LOKESH et al Table 1. Clustering pa
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LOKESH et al Table 4. Mean values o
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ABIRAMI et al Socio-economic Impact
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ABIRAMI et al socio-economic impact
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VEMANNA et al Table 1. Discriminant
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VEMANNA et al total biomass, fresh
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RAO et al Table 1. Plant height, nu
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DEVI et al S.No Category Frequency
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DEVI et al extension contact and ma
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NIRMALA and VASANTHA earliness in a
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NIRMALA and VASANTHA adopted this t
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SUDHARANI et al Table 1. Genotypic
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SUDHARANI et al At genotypic level,
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NIRMALA et al weight of pods per pl
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NIRMALA et al Table 3. Cluster mean
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PUNYAVATHI and VIJAYALAKSHMI 6.5 6.
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PUNYAVATHI and VIJAYALAKSHMI REFERE
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KATTEL et al Table 1. Item Analysis
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RADHIKA et al Thus, the results of
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RAJU et al estimated daily dietary
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RAJU et al Table 3. Physico-chemica
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MINNIE et al Table 2. Estimates of
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Statement about ownership and other
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GUIDELINES FOR THE PREPARATION OF M
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ESSENTIAL REQUIREMENTS FOR CONSIDER
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