Amit KumarVishant2024-06-272024-06-272023-05https://krishikosh.egranth.ac.in/handle/1/5810211001A field experiment on rice crop was conducted at RRS, Kaul (Kaithal) of Chaudhary Charan Singh Haryana Agricultural University, Hisar during Kharif season of 2022 to find out optimum dose of nitrogen in rice under late planted condition for getting good yield. Soil of experimental field was sandy clay loam texture, alkaline in reaction (7.81), low in organic carbon (0.39%), available nitrogen (130 kg ha-1) and medium in available phosphorous (24 kg ha-1) and high in available potash (480 kg ha-1). The experiment consisted of two transplanting dates (P1: 1st week of July and P2: 4th week of July), five levels of N application (N1:0, N2:30, N3:60, N4:90, N5:120 kg N ha-1). Experiment was laid out in factorial randomised block design. The growth parameters viz. plant height (cm), number of tillers m-2 and dry matter accumulation (g) were reduced significantly under late planting (P2) but grain quality parameters viz. protein content of grain (%) and head rice recovery (%) improved significantly under late planting. The crop yield attributes (no. of panicles m-2) and grains per panicle) and grain yield of rice crop were reduced significantly under late transplanting. Uptake of N, P and K by grains and straw were significantly higher with early planting. The yield attributes and yield (grain and straw) of the rice crop increased with every successive increased doses of N level whereas the response was significant up to 90 kg ha-1. Interaction between planting time and N levels was found significant in respect of grain yield which revealed that a dose of 90 kg ha-1 was sufficient in rice crop transplanted timely (1st week of July) whereas the late transplanted crop (4th week July) must be supplied with higher dose of N (120 kg ha-1) to get good yield. Higher yield was, however, obtained with timely transplanted crop (1st week of July) supplied with 90 kg of N ha-1 in three splits.EnglishThesis