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Agriculture Organization of the United Nations，1998.
.
［ 30］ 中国水利水电科学研究院 . 变量灌溉决策支持系统 V1. 0：2023SR0289366［P］ 2023-03-01.
［ 31］ 崔婷，张智韬，崔晨风，等 . 冬小麦归一化植被指数日变化规律及拟合模型研究［J］ 节水灌溉，2018（12）：
.
97-103.
［ 32］ 毛 学 森 ， 张 永 强 ， 沈 彦 俊 . 冬 小 麦 植 被 指 数 变 化 及 其 影 响 因 子 初 探［J］ 中 国 生 态 农 业 学 报 ， 2003（2）：
.
41-42.

Study on generating method of variable rate irrigation prescription map for
sprinkler irrigation based on vegetation index

1
1
1
ZHANG Yongjing ，ZHAO Weixia ，SHAN Zhijie ，HUANG Qian 2

（1. State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin，China Institute of Water Resources and Hydropower

Research，Beijing 100048，China；2. Water Resources Research Institute of Shandong Province，Jinan 250014，China）

Abstract：Compared with canopy temperature，the vegetation index is a composite indicator that reflects the growth

phenotype and information on water and fertilizer deficiency of crops，which provides more comprehensive fundamen⁃
tal information for the generation of variable rate irrigation prescription maps. To investigate the high-precision gen⁃

eration method for dynamic variable rate irrigation prescription map based on vegetation index，this paper proposes a
fan-shaped generation method for variable rate irrigation prescription map based on the optimized soil adjusted vegeta⁃
tion index （OSAVI） This research studied the impact of take-off time and flight altitude of the unmanned aerial
.

vehicle （UAV）multi-spectral system on variable rate irrigation prescription maps，and compared these maps with

those generated using the Normalized Relative Canopy Temperature （NRCT） indicator. The experiment was con⁃
ducted at the Smart Irrigation Technology and Equipment Innovation Demonstration and Promotion Base of the China

Institute of Water Resources and Hydropower Research in Dacaozhuang Management Area，Xingtai City，Hebei Prov⁃

ince，with winter wheat planted in 2023 and 2024. The flight altitude of the UAV multi-spectral system was set at 50，

70，and 90 m，and the take-off times were selected at 8：00，11：00，14：00 and 17：00. The flying area was 1/6 of
the irrigated area controlled by the four-span center-pivot irrigation system with an overhang. The results indicated
that the take-off time of UAV multi-spectral had a significant influence on the spatial distribution of OSAVI. The spa⁃
tial variation of OSVAI was relatively stable at the take-off times of 11：00 and 14：00，and the total irrigation amount

was small，being 17.7% and 18.8% less than that at 17：00，respectively. As the flight altitude of the drone multi-

spectral system increased，there was no significant change in the total irrigation amount，with the maximum differ⁃
ence in the irrigation amount at different flight altitudes being only 6%. Compared with the variable rate irrigation pre⁃

scription maps based on NRCT，the total irrigation volume was reduced by an average of 6%. When using the UAV
multispectral system to obtain the variable rate irrigation prescription map for winter wheat，the recommended take-

off time is between 11：00 and 14：00.

Keywords：UAV；multi-spectral；vegetation index；variable rate irrigation；prescription map

（责任编辑：王 婧）

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