PHOSPHORUS MANAGEMENT IN KHARIF RICE-AUTUMN SUGARCANE RAISE WITH OR WITHOUT INTERCROP OF GREENGRAM VAR. CO-4.
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Title |
PHOSPHORUS MANAGEMENT IN KHARIF RICE-AUTUMN SUGARCANE RAISE WITH OR WITHOUT INTERCROP OF GREENGRAM VAR. CO-4.
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Creator |
PATEL, VINAYKUMAR M.
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Contributor |
PATEL, C.L.
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Subject |
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Description |
Field experiments were conducted during 2004-05 and 2005-06 at Regional Sugarcane Research Station Farm, Navsari Agricultural University, Navsari to study the “Phosphorus management in kharif rice-autumn sugarcane raise with or without intercrop of greengram Cv. Co. 4.” The soil of the experimental plot was clay in texture, medium in organic carbon and available phosphorus, low in available nitrogen, moderately high in available potassium and slightly alkaline in reaction. The experiment on phosphorus management in preceding kharif rice crop was laid out in randomized block design with four treatments consisting two levels of pressmud biocompost (20 and 40 t/ha) and one level of inorganic phosphorus (13.2 kg P/ha) along with control (No phosphorus) replicated four times. The experiment on autumn sugarcane was superimposed on the same site without changing the randomization of treatments during both the years. Keeping kharif rice treatments as a main plots and three phosphorus levels applied to sugarcane raise with and without intercrop of greengram Cv. Co. 4 (Zero kg P/ha without (S1) and with (S2) intercrop, 50 per cent recommended dose of P/ha without (S3) and with (S4) intercrop and 100 per cent recommended dose of P/ha (i.e. 125 kg P2O5/ha) without (S5) and with (S6) intercrop as sub-plots, with total twenty four treatment combinations in split plot design. The highest grain yield (53.26 q/ha pooled data) of kharif rice was recorded with 40 tonnes pressmud biocompost/ha, being at par with 20 tonnes pressmud biocompost/ha and 13.2 kg P/ha, inorganic. The per cent increase recorded with these treatments (chronological) over control (no phosphorus) were 13.62, 11.03 and 7.92 in pooled data, respectively. The increased in grain yield of kharif rice with these treatments was the results of increased growth and yield attributes viz., number of tillers hill–1, number of effective tillers hill–1, number of panicle–2 and number of filled grain panicle m– 2. The phosphorus content in grain and straw as well as phosphorus uptake by grain, straw and their total were increased significantly with application of pressmud biocompost over control. Further, the available phosphorus content of soil after harvest of rice increased significantly with pressmud biocompost application. The net realization and benefit : cost ratio were higher with application of inorganic phosphorus (13.2 kg P/ha), may be due to higher amount and price of pressmud biocompost. Among the phosphorus management treatments, application of 40 tonnes pressmud biocompost/ha to preceding kharif rice crop increased the millable cane yield and sugarcane equivalent yield of succeeding sugarcane. The millable cane yield/sugarcane equivalent yield on pooled basis were increased to the tune of 19.86/19.91, 12.25/12.41 and 5.92/6.40 per cent under T3, T2 and T4, respectively over T1. The quality parameters viz., fibre (%), commercial cane sugar (%) and commercial cane sugar yield (t/ha) were improved with pressmud biocompost applied to preceding rice. Weed population, dry weight of weeds and nutrient content (N, K and S) in different parts of sugarcane did not differ significantly due to different phosphorus management treatments applied to preceding rice crop. However, both the levels of pressmud biocompost (20 and 40 t/ha) applied to rice were increased the total uptake of nutrients (N, P, K and S) by sugarcane as well as improved the nutrient status of soil after harvest of sugarcane crop. While, net realization and benefit : cost ratio from succeeding sugarcane raise with or without intercrop of greengram were significantly increased with application of 40 tonnes pressmud biocompost/ha to preceding kharif rice crop. The yield attributes of sugarcane i.e. number of millable canes per metre row length and per hectare as well as single millable cane weight were improved significantly with phosphorus application. Thus, application of 100 per cent recommended dose of phosphorus to sugarcane raised without intercrop of greengram Cv. Co. 4 (S5) resulted in significantly higher millable cane yield and commercial cane sugar yield (t/ha) and it was at par with 100 per cent recommended dose of phosphorus to sugarcane raise with intercrop (S6) for sugarcane equivalent yield, net realization and benefit : cost ratio of sugarcane. The application of 100 per cent recommended dose of P/ha to sugarcane raise with intercrop noted the higher phosphorus content in leaf blade, leaf sheath and stalk as well as potassium and sulphur content in sugarcane stalk. There was a significant increase in total nutrient (N. P, K and S) uptake by sugarcane and significant improvement in N and P content of soil after harvest of sugarcane with application of 100 per cent recommended dose of P/ha to sugarcane raise with (S6) or without (S5) intercrop of greengram Cv. Co. 4. The balance of soil available N, P and K after each year of rice-sugarcane cropping system was positive under application of pressmud biocompost to preceding rice and it was higher with application of 40 tonnes pressmud biocompost/ha followed by 20 tonnes pressmud biocompost/ha. The available soil N and P balance after each year of ricesugarcane cropping system was positive with application of phosphorus to sugarcane raise with or without intercrop of greengram, and it was increased with increased levels of phosphorus (upto100 per cent recommended dose of P/ha). The soil available K balance showed a positive balance for all treatments but higher value was observed with zero kg P/ha without intercrop (S1). The net realization from rice-sugarcane cropping system was increased significantly with 40 tonnes pressmud biocompost/ha but it was at par with 20 tonnes pressmud biocompost/ha. The net realization and B : C ratio from rice-sugarcane cropping system were increased significantly with application of 100 per cent recommended dose of P/ha to sugarcane raise with (S6) or without (S5) intercrop of greengram Cv. Co. 4. Thus, it can be concluded that to achieve higher economic returns from kharif rice-autumn sugarcane cropping system as well as to sustain the soil fertility, apply 20 tonnes pressmud biocompost/ha to kharif rice and recommended dose of phosphorus (125 kg P2O5/ha) to sugarcane raise with or without intercrop of greengram Cv. Co. 4 under South Gujarat condition. |
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Date |
2016-03-09T10:50:35Z
2016-03-09T10:50:35Z 2008-10 |
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Type |
Thesis
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Identifier |
http://krishikosh.egranth.ac.in/handle/1/64984
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Language |
en
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Format |
application/pdf
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Publisher |
Navsari Agricultural University, Navsari
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