Impact of weather variables on drymatter accumulation and yield of mungbean [Vigna radiata (L.) Wilczek] varieties under different dates of sowing

Abstract

A two year experiment was conducted at the BCKV with four mungbean varieties (Pant Mung-5, Bireswar, RMG-62 and Sukumar) sown under three dates (15 th February, 1 st and 15 th March) in a split plot design where dates of sowing and varieties were allotted to main and sub plot treatments respectively with three replications. PAR was recorded with the help of line quantum sensor. Dry matter accumulation, yield attributes and yield were measured. Canonical correlation and correspondence analysis showed that absorbed PAR during 32 to 46 days after emergence (DAE) increased dry matter, pod and seed yield. PAR use efficiency (PARUE) of mungbean ranged from 0.75 to 0.88 g MJ -1 for seed yield. PARUE for dry matter production was maximum during 39 to 46 DAE. According to PARUE and heat use efficiency, Pant Mung-5 should be sown within 1 st March in this zone. Growing degree day requirement gradually increased with delayed sowing.

Seasonal Variation in Photosynthetically Active Radiation Interception and Radiation Use Efficiency in Green Gram [Vigna radiata (L.)Wilczek] in Lower Gangetic Plain of India

“…PAR use efficiency based on absorbed PAR in green gram ranged from 1. 21 for biomass production in spring -summer season [26] while in the present experiment the values are marginally higher because of variation in intercepted PAR and LAI. , which was significantly greater than the seed yield obtained on other dates of sowing.…”

“…The light harvesting potentiality varies due to foliar traits in a growing canopy [33]. A variation in absorption of PAR by green gram and other crop because of variation in year during spring-summer season was recorded in this climatic zone by different scientists [26,22]. In rainy season, the green gram crop sown under D 3 received the maximum intercepted PAR during its growth period in the first year, while during the second year, the D 1 sown crop had maximum intercepted PAR.…”

“…to the field 15 days before sowing. Recommended fertilizer dose of 20:40:40 kg N-P 2 O 5 -K 2 O per hectare [26] were applied just before sowing.…”

“…Reports on interception of PAR by legume crops, especially green gram and the measurement of the PAR use efficiency (PARUE) are scanty. It was estimated by the researchers [26] that the absorption of PAR and PARUE in green gram during spring -summer season depending on absorption pattern rather than interception pattern of the canopy. PAR absorption differs from PAR interception where the former includes the soil reflection component.…”

Effect of Zinc Nutrition on Lathyrus (Lathyrus sativus L.) under Varying Sowing Dates in the Gangetic Plains

“…Foliar nutrition with Zn, irrespective of doses, was observed to be more effective than soil fertilization in improving yield (1512-1647 kg ha -1 ). Therefore, growing conditions (Tzudir et al 2016) and Zn management (Kumar et al, 2016) favouring improved biomass accumulation, growth rates and partitioning of assimilates to sink in lathyrus are likely to fare well in terms of productivity.…”