Physiological and yield response of okra (Abelmoschus esculentus) to irrigation scheduling and organic mulching
2009
Bahadur, Anant | Singh. K.P. | Rai, Ashutosh | Verma, Ajay | Rai, Mathura
A field experiment carried out during spring summer of 2006-2007 at Indian Institute of vegetable Research, Varanasi. The treatment comprised 4 levels of surface irrigation (4, 7, 10 and 12 days intervals) and 2 level of mulch (Pea straw mulch at 12.5 tonnes/ha and no mulch). Significant difference on morpho physiological and yield attributes were observed in various irrigation treatments and organic mulches. Irrigation scheduled at 4 day in interval exhibited maximum fresh pod yield of okra (15.03 tonnes/ha) with higher leaf water potential, (0.91 MPa), relative water content in leaves (83%), photosynthetic rate (14.10umole CO2/m2/s1) and stomatal conductance (351.9 mmol H2O/m2/S1). Higher chlorphyII concentration index was recorded in 4 or 7 day irrigation intervals. Pea straw mulch significantly enhanced the plant height, number of nodes/plant, number of pod/plant; pod weight and fresh pod yield over non-mulched. Significant improvement was observed in plant physiological parameters and soil water content under pea straw mulch. Irrigation at 10 day interval along with pea straw mulch exhibited maximum water use efficiency (455.72 kg/ha-cm). Significant reduction in weed population (65.4%) and considerable water saving (29.6%) was recorded with use of pea straw mulch over no mulch.
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