Studies on water management variations on nutrient content through agronomic measures in rice land races cultivars

Abstract

Field investigations were conducted in the Wetland Farm, Department of Farm newlineManagement, Tamil Nadu Agricultural University, Coimbatore during Samba seasons of newline2018-19 and 2019-20to study the effect of water management variations and nutrient newlinecontent through agronomic measures in rice land races/ cultivars. newlineField experiments were laid out in split plot design with three replications. newlineThe treatments comprised of two methods of irrigation viz., Flood Irrigation newline(Conventional method) (M1), Alternate Wetting and drying (SRI) (M2), respectively in newlinemain plots with eight rice varieties in sub plots viz., Aromatic rice : Kalanamak (S1), newlineJeeragasamba (S2), Land races: Kavuni (S3), Mappilaisamba (S4), Popular cultivars: newlineImproved TNAU White ponni (S5), Bhavani (S6) and Recently released varieties: CO 51 newline(S7)and CO 52 (S8). newlineThe methods of water management practices and varieties considerably newlineinfluenced the crop growth characters. Among the different methods of irrigation, the newlineconventional method of irrigation produced significantly taller plants at all the stages of newlinecrop growth during both the years while, AWD methods of irrigation had discernibly newlineshorter plants. Among the varieties, with respect to the plant height at harvest stage, the newlineplants was taller with land race Mappilaisamba and shorter plants were noticed under newlinerecently released variety CO 51. newlineAt all the growth stages, the conventional method of irrigation registered higher newlinenumber of tillers m-2 newline, comparative to AWD method of irrigation. Among varieties, CO 52 newlineproduced higher number of tiller per m-2 newline, which was comparable with CO 51 and newlineImproved white ponni variety. Lesser number of tillers was noticed in aromatic rice newlineKalanamak during both the years of the study. newline