降雨变化对不同核桃树种蒸腾耗水及光合特性的影响

詹瑾; 种培芳; 谢惠敏; 王博; 周鹏飞

doi:10.13870/j.cnki.stbcxb.2018.06.027

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降雨变化对不同核桃树种蒸腾耗水及光合特性的影响

更新时间：2025-03-12

- 降雨变化对不同核桃树种蒸腾耗水及光合特性的影响
- Effect of Rainfall Change on Transpiration Water Consumption and Photosynthetic Characteristics of Different Walnut Species
- 水土保持学报 2018年32卷第6期页码：186-191
- 作者机构：
  
  1. 甘肃农业大学林学院,兰州,730070
  2. 陇南市经济林研究院,甘肃,陇南,746000
- 作者简介：
  
  [ "詹瑾(1993-),女,在读硕士研究生,主要从事植物逆境生理生态研究。E-mail:1250626183@qq.com" ]
- 基金信息：
  
  秦巴山区核桃产业发展关键技术集成与示范（2015GA860002）不同品种核桃对早春低温伤害的抵抗能力研究（2016A-028）
- DOI：10.13870/j.cnki.stbcxb.2018.06.027
  中图分类号： S664.1
- 纸质出版：2018
- 稿件说明：
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詹瑾, 种培芳, 谢惠敏, 等. 降雨变化对不同核桃树种蒸腾耗水及光合特性的影响[J]. 水土保持学报, 2018,32(6):186-191.

ZHAN Jin, CHONG Peifang, XIE Huimin, et al. Effect of Rainfall Change on Transpiration Water Consumption and Photosynthetic Characteristics of Different Walnut Species[J]. 2018, 32(6): 186-191.
詹瑾, 种培芳, 谢惠敏, 等. 降雨变化对不同核桃树种蒸腾耗水及光合特性的影响[J]. 水土保持学报, 2018,32(6):186-191. DOI： 10.13870/j.cnki.stbcxb.2018.06.027.

ZHAN Jin, CHONG Peifang, XIE Huimin, et al. Effect of Rainfall Change on Transpiration Water Consumption and Photosynthetic Characteristics of Different Walnut Species[J]. 2018, 32(6): 186-191. DOI： 10.13870/j.cnki.stbcxb.2018.06.027.

摘要

通过探讨核桃（Juglansregia）响应降雨变化时的蒸腾耗水及光合特性，为核桃生产中合理栽植及水分管理提供理论参考。通过人工控制灌水量（-50%，-25%，CK，+25%，+50%），采用盆栽苗木称重法和Li—6400便携式光合仪测定核桃品种香玲、清香和辽核1号在不同水分条件下蒸腾耗水及光合指标，并采用隶属函数法对指标进行分析。结果表明：（1）香玲、清香和辽核1号3种苗木的耗水量和耗水速率在不同水分条件下不同品种间存在显著差异（P<0.05）。夜间耗水量差异较明显，辽核1号在各降雨条件下夜间耗水量所占比例最大，耗水速率较小，具有良好的保水力。（2）清香和辽核1号在不同降雨条件下净光合速率（photosynthetic rate， Pn）的变化主要是由气孔因素限制；香玲在水分较匮乏和较湿润环境中，Pn的变化主要由非气孔限制因素引起。（3）辽核1号水分利用效率（water use efficiency，WUE）处于较高水平；香玲灌水量增加50%，水分利用效率较低；清香灌水量减少50%，水分利用效率骤然上升。（4）结合隶属函数结果分析，香玲不适于水分条件较湿润的环境，清香则在水分较匮乏时依然生长，辽核1号则在不同降雨条件下具有较高适应性。

Abstract

In order to provide theoretical basis for the reasonable planting and water management of walnut production

this study analyzed the water consumption and photosynthetic characteristics of transpiration of walnut response to rainfall change. Through the artificial rainfall simulation environment (-50%

-25%

+25%

+50%)

pot seedling weighing method and a Li-6400 portable photosynthesis system measuring method were adopted to study transpiration of water consumption and photosynthetic characteristics of Xiangling

Qingxiang

and Liaohe1 seedling under different rainfall conditions

and use the membership function method to analyze the indicators. Results showed that:(1) The water consumption and water consumption rate of Xiangling

Qingxiang and Liaohe1 seedlings showed significant difference under different rainfall conditions (P<0.05)

and the difference of water consumption at night was also obvious. The seedlings of Liaohe1 showed the largest water consumption at night in each rainfall condition

small water consumption rate

and good water holding capacity. (2) Under different rainfall conditions

the change of net photosynthetic rate (Pn) of Qingxiang and Liaohe1 seedlings was mainly limited by stomatal factors. Under water scarcity and extreme humidity

the change of net photosynthetic rate(Pn) of Xiangling seedlings was mainly limited by non-stomatal factors. (3) The water use efficiency (WUE) of Liaohe1 seedlings was at a higher level; the WUE of Xiangling seedlings was low in the rainfall increased by 50%; the WUE of Qingxiang seedlings increased sharply in the rainfall reduced by 50%. (4) Combining with the ranking of subordinate function results

Xiangling seedling was suitable for the water conditions that are relatively moist

Qingxiang seedling could grow in the extreme environment lack of water

and Liaohe1 seedling was with high adaptability in different rainfall conditions.

关键词

Keywords

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