Heat unit indexing of garden pea in relation to climate shift and nutrient management

Abstract

An experiment was conducted consecutively during 2016-17 and 2017-18 in the newlineExperimental Farm, Department of Horticulture, Assam Agricultural University, Jorhat to newlinestudy the Heat unit indexing of garden pea in relation to climate shift and nutrient newlinemanagement . The experiment consist three treatments viz., variety (main), fertility newlinemanagement level (sub) and sowing date (sub-sub) laid out in split plot design with newlinerandom allocation and replicated thrice. The main treatment consisted Arkel(V1), newlineA1(V2), DS-10(V3) and GS-10(V4); sub treatment was comprised of 5t FYM, 10-46-0 newlinekgha-1 (F1), 10t FYM, 10-46-10 kgha-1 (F2), 10t FYM, 20-46-20 kgha-1 (F3) and 10t FYM, newline30-46-30 kgha-1 (F4) and sub-sub treatment was dates of sowing: 10th October (S1), 24th newlineOctober (S2), 7th November (S3), 21st November (S4), 5th December (S5) and 20th newlineDecember (S6). newlineGrowth, yield attributes, soil related and quality characters viz., plant height(cm), newlinedays to 50% flowering, pod plant-1, pod length (cm), pod diameter (cm), seed pod-1, newlineshelling (%), pod yield (tha-1), duration (days), growing degree days, root nodules plant-1, newlinetotal plant nitrogen (%), total plant phosphorus(%), total potash (%), TSS (0 Brix), crude newlineprotein (%), soil organic carbon (%), soil available nitrogen (kgha-1), soil available newlinephosphorus (kgha-1), soil available potash (kgha-1) and soil pH have responded significantly newlinedue to treatments as well as their interactions, except pH. Variety evidently produced newlinesignificant effect on growing degree days (GDD) and results showed V4gtV3gtV2gtV1 with newlinerequirement of 955, 948, 933 and 833 GDD for 2016-17 and similarly 958, 949, 942 and newline825 GDD. The maximum duration was reported as 76.00days in V4F with (1,2,3,4) and S( newlinewith 3,4,5). Duration was closely associated with degree days by sowing date had indicated newlinesignificant duration among varieties, least with V1(58.73days), to maximum in newlineV4(72.30days)...