在不同侧距离的表面和地下滴灌系统中,树叶气交换,叶子水潜力和节水灌
Ameneh Karizi1, Seyed Hamid Ahmadi2,3, Tooraj Honar1
1Water Engineering Department, School of Agriculture, Shiraz University, Shiraz, Iran.
BMC plant biology
|November 26, 2025
概括
优化松花产量需要平衡灌和侧面间距. 完全灌20厘米间隔 (FI-L1-SSD) 最大限度地提高了生理性能,而部分根区干燥40厘米间隔 (PRD-L2-SSD) 有效地节约了水.
科学领域:
- 农业学和作物生理学
- 农业中的水资源管理
- 植物压力生理学 植物压力生理学
背景情况:
- 红杉 (Carthamus tinctorius L.) 是面临水资源短缺挑战的重要油作物.
- 滴滴灌提供精确的水应用,但对松花生理学和产量的最佳策略尚未探索.
- 了解灌制度和横向间距之间的相互作用对于可持续的松花生产至关重要.
研究的目的:
- 评估三花对不同灌策略 (根区完全,部分干燥,缺口) 和表面和地下滴灌下的横向间距 (20,40,60厘米) 的生理反应.
- 确定这些处理对关键生理参数的影响,包括叶面积指数,气体交换和水潜力.
- 确定最佳的灌和间隔组合,以最大限度地提高三花种子的产量和用水效率.
主要方法:
- 一个为期两年的分割地块实验使用了全灌 (FI),部分根区干燥 (PRD) 和缺口灌 (DI).
- 三个侧面间距 (L1=20厘米,L2=40厘米,L3=60厘米) 用表面 (SD) 和地下 (SSD) 滴灌系统进行了测试.
- 监测和分析了生理参数 (LAI,An,gs,Tr,LWP) 和种子产量.
主要成果:
- 节水灌将季节性用水量减少了25-26%,SSD用水量比SD少7%.
- 更宽的横间距 (L3) 和节水灌显著降低了叶面积指数 (LAI) 和气交参数 (光合作用,口腔导电,透气).
- 完全灌20厘米间隔 (FI-L1-SSD) 优化生理性能和种子产量. 带有40厘米间隔的部分根区干燥 (PRD-L2-SSD) 提供了最好的节水策略,保持可接受的生理功能并节省约25%的水.
结论:
- 灌策略和横向间距显著影响松花生理学和种子产量.
- 在完全灌 (FI) 条件下,较小的横向间距 (20厘米) 的地下滴灌 (SSD) 是最大限度地提高松花生产力的最佳方式.
- 带有40厘米间距 (L2) 和SSD的部分根区干燥 (PRD) 提供了一个可行的节水方法,用于在水量有限的条件下种植松花.
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