Effects of irrigation and nitrogen application on soil water and nitrogen distribution and water-nitrogen utilization of wolfberry in the Yellow River Irrigation Region of Gansu Province, China

作者：Rongrong Tian, Guangping Qi, Yanxia Kang, Qiong Jia, Jinghai Wang, Feng Xiao, Yalin Gao, Chen Wang, Qiang Lu, Qidong Chen · 发表于：Frontiers in Plant Science · 年份：2023 · DOI：10.3389/fpls.2023.1309219 · 被引用次数：10 · 研究领域：Irrigation Practices and Water Management、Plant Physiology and Cultivation Studies、Horticultural and Viticultural Research

To address the problems of extensive field management, low productivity, and inefficient water and fertilizer utilization in wolfberry ( Lycium barbarum L.) production, an appropriate water and nitrogen regulation model was explored to promote the healthy and sustainable development of the wolfberry industry. Based on a field experiment conducted from 2021 to 2022, this study compared and analyzed the effects of four irrigation levels [75%–85% θ f (W0, full irrigation), 65%–75% θ f (W1, slight water deficit), 55%–65% θ f (W2, moderate water deficit), and 45%–55% θ f (W3, severe water deficit)] and four nitrogen application levels [0 kg·ha −1 (N0, no nitrogen application), 150 kg·ha −1 (N1, low nitrogen application), 300 kg·ha −1 (N2, medium nitrogen application), and 450 kg·ha −1 (N3, high nitrogen application)] on soil water distribution, soil nitrate nitrogen (NO 3 − –N) migration, yield, and water-nitrogen use efficiency of wolfberry. The soil moisture content of the 40–80 cm soil layer was higher than those of 0-40 cm and 80-120 cm soil layer. The average soil moisture content followed the order of W0 > W1 > W2 > W3 and N3 > N2 > N1 > N0. The NO 3 − –N content in the 0–80 cm soil layer was more sensitive to water and nitrogen regulation, and the cumulative amount of NO 3 − –N in the soil followed the order of W0 > W1> W2 > W3 and N3 > N2 > N1 > N0 during the vegetative growth period. There...