Vol. 16 No. 2
Nutrient uptake by crop and weed as influenced by the weed management practices in bush type vegetable cowpea, Vigna unguiculata sub sp. unguiculata (L.) Verdcourt
Author(s): J. K. SINCHANA, S. K. RAJ AND L. GIRIJADEVI
Abstract: Field experiment was carried out to study the effect of stale seed bed and weed management practices on nutrient uptake by weeds, nutrient uptake and green pod yield of bush type vegetable cowpea during Kharif season 2019 at Coconut Research Station, Balaramapuram. The experimental was conducted in randomized block design with two factors viz., factor A - seed bed preparation with two treatments and factor B -weed management practices with eight treatments in three replications. Stale seed bed recorded the lowest total weed dry weight, NPK uptake by weeds and the highest NPK uptake by crop and green pod yield. Among the weed management practices, dried banana leaf mulch @ 10 t ha-1 fb quizalofop -p-ethyl @ 50 g ha-1 on 25 DAS recorded the lowest total weed dry weight, NPK uptake by weeds and the highest total N and P uptake by crop and green pod yield (7589.0 kg ha-1). Pre emergence diclosulam @ 12.5 g ha-1 fb hand weeding at 25 DAS recorded the highest K uptake by crop. Interaction effect revealed that the stale seed bed + dried banana leaf mulch @ 10 t ha-1 fb quizalofop -p ethyl @ 50 g ha-1 on 25 DAS recorded the highest N and P uptake by crop, number of pods per plant, pod weight and green pod yield. The lowest weed dry weight and the lowest NPK uptake by weeds was registered in stale seed bed + pre emergence application of diclosulam @ 12.5 g ha-1 fb hand weeding at 25 DAS.
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