Influence of Irrigation, Nitrogen Stress and Method of Application on Dry Matter Partitioning, Source : Sink Ratio and Nutrient Uptake of Yard Long Bean [Vigna unguiculata subsp. sesquipedalis (L.) Verdcourt]
Publication Date : 22/03/2016
An investigation was carried out at the College of Agriculture, Vellayani, Kerala, to assess the impact of varying irrigation interval, nitrogen stress and method of application of nutrients (soil, soil + foliar) on dry matter partitioning, source : sink ratio and nutrient uptake of yard long bean. Daily irrigation recorded significantly superior total dry matter production and partitioning of photosynthates towards the source while a better (lower) source : sink ratio (0.75) was recorded by irrigation once in three days at 20 mm depth (I3). Nitrogen and phosphorus uptake were significantly improved in treatments receiving daily irrigation, while K uptake was observed to be superior in irrigation once in three days and daily irrigation. Application of N @ 30 kg ha-1 recorded significantly superior total dry matter production and partitioning of photosynthates towards the source while N level of 25 per cent less than RD resulted in a lower source sink ratio (0.79). Soil application (M1) was found to be superior over soil + foliar application (M2) in total dry matter production, dry matter partitioning towards the sink, uptake of nutrients and in creating a better (lower) source : sink ratio.
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