EFFECT OF MICRO-IRRIGATION SYSTEMS AND N-FERTIGATION LEVELS ON YIELD AND QUALITY OF ONION BULBS (CV. PHULE SAFED)
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Date
2000-06-27
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MAHATMA PHULE KRISHI VIDYAPEETH, RAHURI - 413 722
Abstract
Recently M.P.K.V., Rahuri has developed a new white onion cultivar "Phule Safed' especially for year round plantation. However its yield levels in summer season are comparatively low. Under such conditions, the performance of Cv. Phule Safed in summer season along with micro-irrigation systems and different nitrogen-fertigation levels was studied. The experiment was laid out in Factorial Randomised Block Design with three replications and seven treatments. The effect of two micro-irrigation systems viz., drip and drip tape and three N-fertigation levels viz., 75,100 and 125 per cent N of RD (recommended dose, i.e. 100 kg N/ha) were studied on growth, yield and quality parameters of summer onion cultivation. Both the micro-irrigation systems viz., drip and drip tape showed better performance over control (i.e. surface irrigation coupled with band placement application of fertilizers). The maximum water use efficiency (0.91 q ha-1mm-1) was observed in treatment 125 per cent RD of N through drip followed bv 125 per cent RD of N through drip tape (0.87 q ha-1mm-1). Which was about three times more than that of control (0.30 q ha-1 mm.-1). While studying effect of N-fertigation levels, it was observed that yield contributing characters and yield were significantly increased with higher N-fertigations. Among the three fertigation levels significantly higher yields were recorded by 100 and 125 per cent RD of N over 75 per cent RD of N but were at par with each other. Nevertheless 75 per cent RD of N-fertigation recorded significantly higher yield over control. Thus, through use of micro-irrigation system along with N-fertigation showed 25 per cent fertilizer saving over control. Based on economical study maximum (9.39) benefit-cost ratio was recorded in T6 treatment i.e. drip tape with 125 per cent RD of N followed by T5 treatment i.e. drip tape with 100 per cent RD of N (9.37). Therefore considering fertilization cost,£higher TSS content, use of drip tape along with 100 per cent RD of N is concluded for higher white onion (Cv. Phule Safed) yield in summer season.
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