Performance of processing tomatoes under different supply levels of crop evapotranspiration

ABSTRACT Irrigation management is essential to promote appropriate plant growth and guarantee production and quality of the tomatoes for processing, increases the efficiency of nutrients use and contributes to ensure the sustainability of the production chain. This study was installed to evaluate productive performance of two processing tomato hybrids submitted to five water depths under drip irrigation system. Five levels of crop evapotranspiration (ETc) replacement (60%, 100%, 140%, 180% and 220%) and two tomato hybrids (BRS Sena and H 9992) were tested. The experimental design was a 5×2 factorial arranged in randomized complete block design with four replications. During the crop cycle, hybrids BRS Sena and H 9992 needed 692.20 and 418.43 mm of water, yielding 80 and 44.06 t ha-1, respectively. For both hybrids, the higher water productivity was observed when lower levels of irrigation were applied. Higher productivities and pulp yields of ‘BRS Sena’ and ‘H 9992’ were noticed when replacing 150-166% and 99-101% ETc, respectively. We observed that improving the performance of processing hybrid tomatoes is possible by adjusting irrigation levels for each hybrid according to growing conditions.

摘要：灌溉管理对于保障加工番茄适宜生长、稳定其产量与品质，提升养分利用效率，以及推动生产链的可持续发展均具有重要意义。本研究旨在评估滴灌系统下，5个供水梯度对2个加工番茄杂交品种生产性能的影响。试验设置5个作物蒸发蒸腾量（crop evapotranspiration, ETc）补水水平（60%、100%、140%、180%及220%），并选用2个番茄杂交品种（BRS Sena与H 9992），采用5×2因子的随机完全区组设计，设置4次重复。在作物生育期内，BRS Sena与H 9992的总需水量分别为692.20 mm与418.43 mm，对应产量分别为80 t·ha⁻¹与44.06 t·ha⁻¹。对于两个品种而言，较低灌溉水平下的水分生产率更高。当补水比例分别为150%~166% ETc与99%~101% ETc时，‘BRS Sena’与‘H 9992’可获得更高的产量与果肉得率。本研究结果表明，可根据不同品种的生长条件调整灌溉水平，从而优化加工型番茄杂交品种的生产性能。