Effect of fertigation levels and schedules on growth, yield and economic returns of tomato (Solanum lycopersicum L.)

Vasanthi, B. G.; Srinivasappa, K. N.; Manjunath, B. L.; Padmavathi, M.

doi:10.15740/has/irjaes/8.2/320-324

Cited by 1 publication

(1 citation statement)

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“…This might be due to the frequent supply of N through drip irrigation at the proper time, which helps in meeting the nutritional requirement of the crop and leading to maximum uptake of the nutrients. The same positive effects of wise fertigation scheduling upon yield are widely reported in the literature (Arafa et al 2009;Kuscu et al 2014;Vasanthi et al 2017).…”

Section: Yield Responsesupporting

confidence: 71%

Effect of Nitrogen Application and Fertigation Scheduling On Potato Yield Performance Under Drip Irrigation System

2023

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The drip irrigation method offers the potential of higher application efficiency of water and allows precise placement of fertilizer directly in the root zone. The use of drip irrigation also facilitates the frequent application of fertilizer via injection in the irrigation system, which allows the conjunction between nutrient application and time of crop needs. The effect of nitrogen (N) rate and drip fertigation scheduling were evaluated on yield, N uptake, and recovery of potato grown on sandy soil. The N was applied at two rates under regular irrigation (control) or through drip irrigation along with four fertigation schedules including: equal doses applied at the weekly or biweekly intervals and different doses based on growth curve characters (12.5, 25, 50, and 12.5% of the total N amount) at the same intervals, for initial, developmental, mid, and mature stages, respectively. The N rate and wise fertigation scheduling significantly affected yield and yield components except for the tuber number per plant. The higher tuber yield was associated with a higher N rate when the respective nutrient was stage wise scheduled and typically responded to growth curve character than equal scheduling at any time intervals. The increase in yield was higher with wise weekly by 13 and 22% than with equal weekly or biweekly intervals, respectively. For this scenario, the modeled crop uptake at the weekly interval was 16% higher than equal applied at the same interval or even greater by 31% than equal applied at the biweekly interval. Similarly, the higher N rate and wise weekly scheduling increased N recovery and N use efficiency (NUE). Soil N movement with wise scheduling resulted in lesser leaching of NO3−-N to deeper soil layers, particularly with wise weekly scheduling. The framework presented in this study regarding the rate and N scheduling to copy with plant growth curve can sustain high crop yield while reducing NO3−-N leaching, increasing N uptake and recover.

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Section: Yield Responsesupporting

confidence: 71%