Water, nitrogen, and phosphorus coupling improves gray jujube fruit quality and yield

Xudong Zhang; Jingjing Wang; Xinlu Bai; Shijie An; Qiangqing Zheng; Zhihui Tang; Jinhu Zhi

doi:10.1515/biol-2022-0863

Water, nitrogen, and phosphorus coupling improves gray jujube fruit quality and yield

Open Life Sci. 2024 Apr 26;19(1):20220863. doi: 10.1515/biol-2022-0863. eCollection 2024.

Authors

Xudong Zhang^{1

2}, Jingjing Wang³, Xinlu Bai^{1

2}, Shijie An^{1

2

3}, Qiangqing Zheng³, Zhihui Tang⁴, Jinhu Zhi^{1

2}

Affiliations

¹ College of Agriculture, Tarim University, Aral, 843300, China.
² Research Center of Oasis Agricultural Resources and Environment in Southern Xinjiang, Tarim University, Aral, Xinjiang 843300, China.
³ Research Institute of Garden, Xinjiang Academy of Agricultural Reclamation Sciences, Shihezi, Xinjiang, 832000, China.
⁴ Research Institute of Mechanical Equipment, Xinjiang Academy of Agricultural Reclamation Sciences, Shihezi, Xinjiang, 832000, China.

Abstract

Irrigation and fertilization are indispensable links in the jujube planting industry in southern Xinjiang, China. Regulating the relationship between fertilization and irrigation can effectively reduce costs and improve economic efficiency. A 2-year water and fertilizer optimization coupling test was conducted to determine the optimal water and nutrient supply scheme. The three-factor randomized block experiment included water (W), nitrogen (N), and phosphorus (P). According to the principal component analysis of each index, each treatment's comprehensive score was obtained. Using yield and economic regression models, the theoretical value and yield value of the optimal economic benefit are inferred. When W, N, and P were applied together, the fruit quality and yield of each treatment significantly differed, and the vitamin C, soluble sugar, and sugar-acid ratio increased significantly with an increase in N fertilizer. However, the titratable acid decreased. An increase in irrigation and nitrogen application significantly increased fruit yield. The comprehensive score was the highest in the N4P3W2 treatment, which improved fruit quality, and the lowest in the N3P3W2 treatment. When the amounts of N, P, and W were 275.56 kg hm^-2, 413. 66 kg hm^-2, and 7278.19 m³ hm^-2, respectively, the theoretical economic benefit was the best. The N4P3W2 treatment is the optimal treatment.

Keywords: comprehensive evaluation; economic model; fruit quality; gray jujube; water and fertilizer integration; yield; yield model.