Vol. 12, Issue 4 (2023)

Author(s):
Rokkam Sai Manisha

Abstract:
The field experiment entitled “Influence of planting patterns and weed control treatments on growth and development of transplanted Gobhi Sarson (Brassica napus var. napus)” was carried out during Rabi 2021 at Agronomy farm, Lovely Professional University, Phagwara, Punjab. The experiment consisted of fifteen treatment combinations of three different planting patterns (Flat, one row per bed, two rows per bed) in main plots and five weed control treatments i.e., T1: Pendimethalin @ 0.45 kg/ha, pre-emergence, T2: Straw mulching (5 t/ha), T3: Black plastic mulch, T4: One hand weeding (30 DAT), T5; Unweeded(control) in subplots. The experiment was laid out in Split Plot Design with four replications, size of the experimental plots are 5m×3m. Results showed that significantly less weed population and dry matter accumulation in plastic mulch and all the planting patterns are at par with each other in both weed count (Per sq.m) and weed dry matter (Per sq ft). Incase of growth parameters, minimum plant height was observed in planting pattern of two rows per bed which was significantly lesser when compared to other planting patterns. Among weed control treatments, Plant height was significantly higher in treatments of Pendimethalin @ 0.45 kg/ha and straw mulch when compared to other weed control treatments and these two treatments were at par with each other. Incase of yield parameters, seed yield was observed to be higher in planting pattern of two rows per bed whose value is 17.29 q/ha which was significantly higher than other two planting patterns. Among weed control treatments, straw mulch, plastic mulch and one hand weeding recorded significantly higher yield than control and pre em. application of pendimethalin @ 0.45 kg/ha. However, application of pendimethalin @ 0.45 kg/ha as pre emergence recorded significantly higher yield than unweeded (control) treatment.