HE Xueling,WEI Qinfang,ZHANG Xiaolan.Response of Photosynthetic Characteristics of Astragalus mongholicus Bunge to Different Fertilization (Organic) Levels[J].Northern Horticulture,2022,(10):89-94.[doi:10.11937/bfyy.20214302]
黄芪光合特性对不同施肥（有机）量的响应
- Title:
- Response of Photosynthetic Characteristics of Astragalus mongholicus Bunge to Different Fertilization (Organic) Levels
- Keywords:
- Astragalus mongholicus Bunge; organic fertilizer; photosynthetic characteristics; light response; environmental factors
- 文献标志码:
- A
- 摘要:
- 以一年生黄芪（Astragalus mongholicus Bunge）为试材，通过设置5个施肥水平（667 m2分别施肥0、500、1 000、1 500 、2 000 kg），研究了不同施肥量对黄芪的净光合速率（Pn）、气孔导度（Gs）、蒸腾速率（Tr）、胞间CO2浓度（Ci）、最大净光合速率（Pnmax）、光补偿点（LCP）、光饱和点（LSP）和暗呼吸速率（Rd）等的影响，以期为黄芪光和特性的施肥提供参考依据。结果表明：1）适量施有机肥可以提高黄芪的Pn、Pnmax、Rd、LCP、Tr和Gs，且能降低Ci，但对LSP的影响不明显。2）当667 m2施肥量为1 500 kg时黄芪的Pn最大，1 500~2 000 kg时Pnmax最大，1 000~1 500 kg时Tr、Gs和Rd最大，2 000 kg时Ci最小，但LCP和LSP的最佳施肥量随月份的不同而差异较大。因此该地区在种植黄芪每年667 m2施有机肥1 500~2 000 kg时光合能力最佳。
- Abstract:
- One-year-old Astragalus mongholicus Bunge was used as experimental material,five fertilization levels (0,500,1 000,1 500 and 2 000 kg per 667 m2) were set.The effects of different fertilization rates on net photosynthetic rate (Pn),stomatal conductance (Gs),transpiration rate (Tr),intercellular CO2 concentration (Ci),maximum net photosynthetic rate (Pnmax),light compensation point (LCP),light saturation point (LSP) and dark respiration rate (Rd) of Astragalus mongholicus Bunge were studied,in order to provide reference for the fertilization of light and characteristics of Astragalus mongholicus Bunge.The results showed that,1) Proper application of organic fertilizer increased Pn,Pnmax,Rd,LCP,Tr and Gs of Astragalus mongholicus Bunge and decreased Ci,but had no obvious effect on LSP.2) the maximum Pn,the maximum Pnmax,the maximum Tr,Gs and Rd,and the minimum Ci were observed when the fertilization application of 667 m2 was 1 500 kg,1 500-2 000 kg,1 000-1 500 kg,and 2 000 kg,respectively.However,the optimal fertilization rate of LCP and LSP varied greatly with different months.Therefore,the timing capacity of 1 500-2 000 kg organic fertilizer per 667 m2 of cultivated Astragalus mongholicus Bunge in this area was the best.
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备注/Memo
第一作者简介：何雪玲（1979-），女，本科，高级农艺师，现主要从事经济作物技术推广等工作。E-mail:414840417@qq.com.责任作者：魏琴芳（1967-），女，本科，高级农艺师，现主要从事经济作物技术推广等工作。E-mail:794420779@qq.com.基金项目：国家重点研发计划资助项目（2018YFD0201100）。收稿日期：2021-10-23