Yield response, water productivity, and seasonal water production functions for maize under deficit irrigation water management in southern Taiwan

摘要

As the challenges toward increasing water for irrigation become more prevalent, knowledge of crop yield response to water can facilitate the development of irrigation strategies for improving agricultural productivity. Experiments were conducted to quantify maize yield response to soil moisture deficits, and assess the effects of deficit irrigation (DI) on water productivity (water and irrigation water use efficiency, WUE and IWUE). Five irrigation treatments were investigated: a full irrigation (I _(1)) with a water application of 60?mm and four deficit treatments with application depths of 50 (I _(2)), 40 (I _(3)), 30 (I _(4)), and 20?mm (I _(5)). On average, the highest grain yield observed was 1008.41?g?m~(?2) in I _(1), and water deficits resulted in significant (p ?