Effect of different crop established methods and weed control treatments on chlorophyll content, yield and water use efficiency in rice

摘要

A field experiment was conducted at JNKW, Jabalpur with an objective to find out the effect of crop establishment methods and weed control treatments on chlorophyll content, yield and water use efficiency of rice. This field experiment was conducted during kharif season of the year 2017 with three crop establishment method (direct seeded rice, system of rice intensification, transplanted rice) and five herbicidal applications (bispyribac-sodium 10 SC @ 20g/ha, fenoxaprop-p-ethyl 9.3 EC @ 93 g/ha, fenoxaprop-p-ethyl 6.7 EC @ 56 g/ha, Hand weeing and weedy check). Experiment was laid out in a split plot design with three replications. Results indicated that Chlorophyll content was maximum recorded in TPR (39.2) followed by SRI (38.1) and DSR (34.4). Among the herbicidal application, maximum chlorophyll content was obtained in Bispyribac sodium 10 SC @ 20 g/ha. Among planting methods maximum WUE was significantly higher in SRI (9.81 kg/ha-mm) followed by TPR (8.26 kg/ha-mm) and DSR (6.66 kg/ha-mm), among weed control treatments, maximum water use efficiency (WUE) exhibited in hand weeding (10.6 Kg/ha-mm) while minimum in weedy check plot (6.21Kg/ha-mm). Among herbicides application W_1 (9.26 Kg/ha-mm) observed significantly higher WUE followed byW_3 (8.30 Kg/ha-mm) and W_2 (7.38 Kg/ha-mm) treatments.