Effects of Organic Fertilizer on Photosynthesis, Yield, and Quality of Pakchoi under Different Irrigation Conditions

被引:4
作者
Lin, Shudong [1 ]
Wei, Kai [1 ]
Wang, Quanjiu [1 ]
Sun, Yan [1 ]
Deng, Mingjiang [1 ]
Tao, Wanghai [1 ]
机构
[1] Xian Univ Technol, State Key Lab Ecohydraul Northwest Arid Reg, Xian 710048, Peoples R China
来源
PLANTS-BASEL | 2024年 / 13卷 / 10期
基金
中国国家自然科学基金;
关键词
organic fertilizer; photosynthetic characteristics; light response model; pakchoi; yield; quality; LIGHT-RESPONSE CURVE; WATER; MODEL;
D O I
10.3390/plants13101308
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Water scarcity and the overuse of chemical fertilizers present significant challenges to modern agriculture, critically affecting crop photosynthesis, yield, quality, and productivity sustainability. This research assesses the impact of organic fertilizer on the photosynthetic attributes, yield, and quality of pakchoi under varying irrigation water conditions, including fresh water and brackish water. Findings reveal that the modified rectangular hyperbolic model most accurately captures the photosynthetic reaction to organic fertilization, outperforming other evaluated models. The maximum net photosynthesis rate (Pnmax), yield, soluble sugar (SS), and soluble protein content (SP) all exhibited a downward-opening quadratic parabolic trend with increasing amounts of organic fertilizer application. Specifically, under fresh-water irrigation, the optimal Pnmax, yield, SS, and SP were obtained at organic fertilizer rates of 65.77, 74.63, 45.33, and 40.79 kg/ha, respectively, achieving peak values of 20.71 mu mol/(m2<middle dot>s), 50,832 kg/ha, 35.63 g/kg, and 6.25 g/kg. This investigation provides a foundational basis for further research into the intricate relationship between water salinity stress and nutrient management, with the goal of crafting more sophisticated and sustainable farming methodologies. The insights gained could significantly influence organic fertilizer practices, promoting not only higher yields but also superior quality in agricultural outputs.
引用
收藏
页数:15
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