根源驱动的调动在中国白菜中:树枝球适应和对土壤动态的影响
Shunjin Li1, Bingli Wei1, Kai Sun1
1College of Resources and Environment, Interdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin, Key Laboratory of Green and Low-carbon Agriculture in Southwest Mountain, Ministry of Agriculture and Rural Affairs, Academy of Agricultural Sciences, Southwest University, Chongqing, 400715, China.
Plant physiology and biochemistry : PPB
|August 29, 2025
概括
通过优化 (P) 肥料的应用,通过改善根性质,提高了中国白菜的产量和P吸收. 平衡的P供应促进了根排泄,有助于土壤的P转化和保持P平衡.
科学领域:
- 农业科学
- 土壤科学
- 植物生理学
背景情况:
- 提高蔬菜 (P) 吸收效率对于作物产量和P利用至关重要.
- 了解不同的P肥料如何影响根和根球的动态,土壤P转化和植物P吸收至关重要.
研究的目的:
- 调查不同 (P) 肥料应用率对中国白菜产量,P吸收,根特性和土壤P转化的影响.
- 确定提高中国白菜中P吸收和利用效率的策略.
主要方法:
- 在两年内进行的实地实验,使用了5次P剂量 (0-393公斤P ha-1).
- 对中国白菜产量,总P度和吸收,根参数 (长度,表面积) 和P吸收效率的分析.
- 根排泄物 (氧酸盐,酸盐,酸盐,乳酸盐) 和土壤P分量 (Olsen-P,NaHCO3-Pi,NaOH-Pi等) 的测量 ) 的情况.
主要成果:
- 中国白菜的产量和P吸收率随着P施肥增加,而P吸收效率则以更高的速度下降.
- 增加的P受精导致了更大的根长和表面积,但减少了氧化酸和酸盐等有机酸的排泄.
- 土壤Olsen-P和可变的P分量随着P的应用而增加,根氧化物排泄增强了P缺乏下NaOH-Pi的溶解.
结论:
- 对于91%的相对产量,确定了20.64毫克/公斤的临界土壤可用P值 (Olsen-P).
- 平衡的P供应促进了根氧酸盐的排泄,促进了NaOH-Pi转化为生物可用的NaHCO3-Po,从而维持了树根球P平衡.
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