1. Agricnltural College of Shihezi University, Shihezi, Xinjiang 832003, China; 2. Key Laboratory of Featured Fruits and Vegetables Cultivation Physiology and Germplasm Resources Utilization of Xinjiang Production and Construction Corps, Shihezi University, Shihezi, Xinjiang 832003, China
Abstract：The effect of irrigation quota and frequency on root growth and yield of processing tomato(H1015)under mulch drip irrigation was studied experimentally to understand their response mechanisms to different irrigation systems in Northwest China. Three irrigation quotas(W1-100%ET0, W2-75%ET0; W3-50%ET0, ET0-reference crop evapotranspiration)and two frequency levels(F1-three times a week; F2-once a week)were used in the experiment. The experimental results show that the roots of processing tomato are mainly distributed in 0-40 cm soil layer(63.20%-85.67% estimated), and the root growth and dry matter quality gradually are decreased with increasing soil depth. The conventional irrigation frequency(F2)and small irrigation quota(W3)can promote the roots to develop into deep soil, but the high frequency irrigation(F1)and large irrigation quota(W2)can be in favor of roots distributed within a relatively shallow layer of soil. The soil water content under high frequency irrigation shows a less fluctuation and remains within a stable range in comparison with conventional frequency irrigation. Meanwhile, the soil volumetric moisture, leaf area index, dry weight and yield rise with increasing irrigation quota and frequency. At the same irrigation frequency, there is no statistically significant difference in tomato yield between large and medium quotas(P>0.05), but significant between large and small quotas(P<0.05). With comprehensive consideration of root growth, yield and water resource saving, the nearly optimum irrigation system for processing tomato in Northwest China should be 75% ET0 irrigation quota, once a week irrigation frequency in seedling period, three times a week irrigation frequency in flowering to fruiting periods.
张坤,刁明,景博,张筱茜,万文亮,郭鹏飞,韩文. 不同灌水量与灌水频率对加工番茄根系生长和产量的影响[J]. 排灌机械工程学报, 2020, 38(1): 83-89.
ZHANG Kun,DIAO Ming,JING Bo,ZHANG Xiaoqian,WAN Wenliang,GUO Pengfei,HAN Wen. Influence of irrigation quota and frequency on root growth and yield of processing tomato. Journal of Drainage and Irrigation Machinery Engin, 2020, 38(1): 83-89.
