NITROGEN MANAGEMENT FOR ZERO-TILL RABI CASTOR (Ricinus communis L.) UNDER THE INFLUENCE OF DIFFERENT PRECEDING CROPS

Simple item page
dc.contributor.advisorVENKATA RAMANA, M
dc.contributor.authorMADHU, M
dc.date.accessioned2016-09-06T14:28:03Z
dc.date.available2016-09-06T14:28:03Z
dc.date.issued2014
dc.description.abstractA field experiment entitled “Nitrogen management for zero-till rabi castor (Ricinus communis L.) under the influence of different preceding crops” was conducted during kharif and rabi 2010-11 and 2011-12 at College Farm, College of Agriculture, Rajendranagar, ANGRAU. The experiment was laid out in split plot design, replicated thrice, with four preceding crops in main plots (greengram, groundnut, bajra and maize) and five nitrogen levels to rabi castor in sub plots (0,40, 80, 120 and 160 kg N ha-1). The results showed that among different preceding crops evaluated, greengram markedly increased growth parameters like plant height, LAI, dry matter production of castor. Similarly, various yield attributes viz., length of primary spike, number of spikes plant-1, number of capsules primary spike-1 and total number of capsules plant-1 of castor were also higher when castor followed greengram. The greengram-castor system recorded higher castor seed yield (3137 and 2875 kg ha-1) over bajra-castor (2949 and 2714 kg ha-1), groundnut-castor (2630 and 2373 kg ha-1) and maize-castor (2479 and 2256 kg ha-1) systems. However, the seed yield of former two systems was found at a par during both the years. Stalk yield, harvest index, oil content, oil yield and nutrient uptake followed the same trend. The post harvest soil available N status at the end of kharif / beginning of rabi season was higher in greengram-castor (292.5 and 300.8 kg ha-1) and groundnut-castor (277.3 and 289.8 kg ha-1) systems compared to that of bajracastor (243.8 and 256.3 kg ha-1) and maize-castor (252 and 265 kg ha-1) systems. Similar positive influence of these two preceding crops was also observed at the end of rabi season. Similarly the gross returns (`75290 and 83379 ha-1), net returns (`56735 and 64024ha-1) and BCR (3.01 and 3.27) of rabi castor were significantly greater when castor followed greengram compared to that of castor grown after other kharif crops. However, it did not differ statistically with bajra-castor. Among nitrogen levels, application of 160 kg N ha-1 and 120 kg N ha-1, being at par, recorded taller plants, greater number of leaves plant-1 and higher dry matter production at all the stages of crop growth and superior LAI at 90 DAS and better yield components over lower N levels. Similarly, the seed yield (3539 and 3144 kg ha-1 and stalk yield (3713 and 3144 kg ha-1) of castor at 160 kg N ha-1 was comparable to that of 120 kg N ha-1 (3396 and 3046 kg ha-1 seed yield; 3598 and 3484 stalk yield, during 2010-11 and 2011-12, respectively) and both were found superior to lower N levels during two years of study. The N, P and K uptake also followed same trend. Higher soil available N status was observed at higher N levels viz., 160 kg N ha-1 (303.7 and 314.6 kg ha-1) and 120 kg N ha-1 (277.2 and 289.6) compared to lower N levels at the end of rabi season. Application of 160 kg N ha-1 resulted in significantly higher gross returns (`84936 and `91162 ha-1), net returns (`65308 and `70734 ha-1) and BCR (3.33 and 3.46) over lower N levels, except 120 kg N ha-1 which recorded identical values for gross returns (`81498 and `88341 ha-1), net returns (`62356 and `68399 ha-1) and BCR (3.25 and 3.43) in both the years respectively. Among different systems, maize-castor with application of 120 kg N ha-1 to castor gave greater system productivity in terms of CEY (6685 and 5828 kg ha-1 year-1), systems gross returns (160440 and 169002 ` ha-1 year-1), system net returns (124798 and 131460) and BCR (3.5 and 3.5), eventually higher system productivity day-1 (18.3 and 16 kg ha-1 day-1) and system profitability (342 and 360 ` ha-1 day-1). However, it did not differ statistically with greengram-castor at the same level of ‘N’ with comparable CEY (6356 and 5515 kg ha-1 year-1), system gross returns (152552 and 159925), system net returns (122510 and 127983), BCR (4.08 and 4.01), system productivity per day (17.4 and 15.1 kg ha-1 day-1) and system profitability (336 and 351 ` ha-1 day-1). The results suggest that for securing higher economic returns, system productivity and profitability, maize-castor/ greengram-castor cropping system with the application of 120 kg N ha-1 to zero-till rabi castor may be the better option for enhancing castor production in Southern Telangana Zone of Andhra Pradesh.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/75656
dc.language.isoenen_US
dc.publisherACHARYA N. G. RANGA AGRICULTURAL UNIVERSITY. RAJENDRANAGAR, HYDERABADen_US
dc.relation.ispartofseriesD9544;
dc.subAgronomy
dc.subjectNITROGEN, MANAGEMENT, ZERO, RABI, CASTOR, PRECEDING, CROPSen_US
dc.these.typePh.D
dc.titleNITROGEN MANAGEMENT FOR ZERO-TILL RABI CASTOR (Ricinus communis L.) UNDER THE INFLUENCE OF DIFFERENT PRECEDING CROPSen_US
dc.typeThesisen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
D9544.pdf
Size:
2.31 MB
Format:
Adobe Portable Document Format
Description:
NITROGEN MANAGEMENT FOR ZERO-TILL RABI CASTOR (Ricinus communis L.) UNDER THE INFLUENCE OF DIFFERENT PRECEDING CROPS
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
2.28 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Theses