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


Author(s) :

Anjana R.S. , Dr. Sheela K.R.


Volume/Issue :
Volume 2
,
Issue 3
(03 - 2016)



Abstract :

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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