文献类型： 外文期刊

作者： Niu, Junfang ¹ ; Feng, Junxia ² ; Liu, Shengyao ³ ; Jia, Songnan ³ ; Fan, Fengcui ³ ;

作者机构： 1.Chinese Acad Sci, Inst Genet & Dev Biol, Ctr Agr Resources Res, Key Lab Agr Water Resources, Shijiazhuang 050021, Peoples R China

2.Shijiazhuang Univ, Sch Chem Engn, Shijiazhuang 050035, Peoples R China

3.Hebei Acad Agr & Forestry Sci, Inst Agr Informat & Econ IAIE, Shijiazhuang 050051, Peoples R China

关键词： irrigation schedule; pan evaporation; spinach (Spinacia oleracea L; ); drip irrigation; crop coefficient

期刊名称：HORTICULTURAE （ 影响因子：3.1； 五年影响因子：3.4 ）

ISSN：

年卷期： 2023 年 9 卷 6 期

页码：

收录情况： SCI

摘要： The objective of this paper is to perform drip irrigation scheduling for spinach (Spinacia oleracea L.) in a plastic greenhouse using the standard 20 cm evaporation pan. A drip irrigation experiment with four levels of irrigation, i.e., 0.6, 0.8, 1.0, and 1.2 times the cumulative evaporation of a 20 cm standard pan (Epan) were set up. The irrigation interval was controlled using a 20 mm Epan, and optimal irrigation water amounts of 0.8 Epan and 0.6 Epan were recommended for the spring and autumn growing seasons, respectively. Overirrigation (1.2 Epan) also led to yield losses, particularly for stem growth. In addition, a proper greenhouse index, defined as the ratio of the cumulative Epan inside and outside the greenhouse, could predict the Epan inside the greenhouse using the external Epan to a high degree of accuracy (daily data with r(2) = 0.85, root mean square error (RMSE = 0.68 mm d(-1)), for a 4-day interval with r(2) = 0.95, RMSE = 1.81 mm 4 day(-1), and for the entire growth period with r(2) = 1.0, RMSE = 2.40 mm). A simple and low-cost greenhouse index method could be used to formulate drip irrigation schedules for spinach in low-technology plastic greenhouses using a 20 cm standard pan outside the greenhouse.