Abstract
Phosphorus fertilizers have a great importance for mung bean (Vigna radiata). It not only increases the yield and yield components of the crop but also improve the quality of the produce. This experiment was designed to evaluate the performance of phosphorus application rates on different mung bean varieties. The experiment was conducted at Robbitkebele in Ambasel district on the land of fruit development and seedling nursery of Amhara Development Association (ADA). It was carried out under rain fed conation of 2016 main season. The effects of P application rate on yield and yield components of the crop were studied using three varieties (N26, NVL-1 and Shewarobit). The varieties were received four levels of phosphorus (0, 23, 46and 69 kg ha-1 P2O5) with factorial randomized complete block design (RCBD) and the treatments replicated three times. The results showed that application of P significantly affected total mung bean yield. Main effects of crop varieties and phosphorus rate were showed significant influence on thedays to flowering, days to maturity, plant height, number of pods per plant, number of seeds per pod, harvest index, biomass yield, and seed weight per plant. However, days to emergence, stand count at emergence, and stand count at harvest were not significantly affected by individual effects of crop variety and P rate. The maximum plant height, number of seeds per pod and 100 seeds weight were obtained due to planting mung bean N26 variety. The maximum weight of seeds per plant, number of pods per plant, biomass yield harvest index and grain yield were recorded by NVL 1 variety meanwhile the lowest grain yield obtained by Shewarobit variety. Mung bean N26 variety and 69 kg ha-1 P2O5 treatment produce the highest yield. Application of phosphorus up to 46 kgha-1 P2O5 increased number of pods per plant, pod length, number of seeds per pod, seed yield, harvest index, biomass yield, yield and 100 seed weight in a rapid change but application of more dose of phosphorus increase the yield at low rate. Based on the economic analysis application of 46 kg ha-1 P for variety NVL1, and 69 kg P for N26 and Shewarobit varieties were economically feasible.
Highlights
Description of the Study Area The experiment was conducted at Robbitkebele in Ambasel district on the land of fruit development and seedling nursery of Amhara Development Association (ADA) (Figure 1)
The experimental soil was found to be moderate in Cation Exchange Capacity (CEC) (32.5 Cmolc(+) kg-1), non saline or low in salt content (4 ds/m), high in exchangeable potassium (0.65 cmolc(+) kg-1 soil), low in total nitrogen (0.18%) and Available phosphorous of soil was high (13.4 mg kg-1), according to Olsen P sufficiency test soil P is very low at < 3 ppm, low at 4 -7 ppm, medium 8 -11 ppm and high > 12 ppm
The response of different mung bean varieties to P application rate study was conducted in Ambasel District in 2016 main season
Summary
Wilczek) is an important legume crop with high nutritive values. It is an eco-friendly food grain leguminous crop for dry land agriculture [1]. Pulses are an excellent source of dietary proteins and can play an important role in fulfilling food requirements of rapidly increasing population [2]. 9.3 billion by 2050 should be in par with crop production to ensure food security [2]. Mung bean seed is more palatable, nutritive, digestible and non-flatulent than other pulses grown in country. It is known as king of the pulses.
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