种植密度对扁蓿豆生产性能和光合特性的影响

doi:10.12190/j.issn.2096-1197.2023.02.08

Abstract

Abstract: 【Objective】To explore the effects of different planting density on production performance and photosynthetic characteristics of Medicago ruthenica L.【Methods】In Shaerqin Township,Tumd Left Banner,Hohhot,Inner Mongolia,Medicago ruthenica（L.） Trautv cv. ‘Keerqinshadi’ as experimental materials were planted in split-plot design. The main plot was different row spacing treatment,with three levels of 100,140 and 180 cm. The sub-plot was different plant spacing treatment,with three levels of 100,80 and 60 cm. The effects of different plant and row spacing on the production characteristics of fresh grass yield,hay yield and seed yield of Medicago ruthenica（L.） Trautv cv. ‘Keerqinshadi’,as well as the photosynthetic characteristics such as net photosynthetic rate,stomatal conductance and transpiration rate were analyzed.【Results】Under plant and row spacing of 80 cm×140 cm treatment,the fresh grass yield and hay yield of Medicago ruthenica（L.） Trautv cv.‘Keerqinshadi’ were highest,at 29 375.000 kg/hm² and 10 784.722 kg/hm²,respectively. Under plant and row spacing of 80 cm×100 cm treatment,the seed yield of Medicago ruthenica （L.） Trautv cv. ‘Keerqinshadi’ was the highest,at 645.833 kg/hm². When the plant and row spacing was 80 cm×140 cm,the net photosynthetic rate,stomatal conductance,transpiration rate and light intensity inside the leaf chamber of Medicago ruthenica（L.） Trautv cv. ‘Keerqinshadi’ were highest at 1.356 μmol/（m²·s）,0.018 mol/（m²·s）,0.808 mmol/（m²·s）and 1 201.544 mol/（m²·s）,respectively.【Conclusion】The suitable plant spacing of Medicago ruthenica （L.） Trautv cv. ‘Keerqinshadi’ in Hohhot,Inner Mongolia was 80 cm,and row spacing in the range of 100-140 cm,and the production performance and photosynthetic characteristics were better under this density.

Key words: Medicago ruthenica L., Plant and row spacing, Production performance, Photosynthetic characteristics

CLC Number:

S541.9

LIU Wanpeng, ZHU Lin, LI Yuexuan, LI Zhiyong, GUO Maowei, SUN Juanjuan, LI Hongyan. Effects of planting density on production performance and photosynthetic characteristics of Medicago ruthenica L.[J].Journal of Northern Agriculture, 2023, 51(2): 65-73.

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URL: https://journal30.magtechjournal.com/bfnyxb/EN/10.12190/j.issn.2096-1197.2023.02.08

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Effects of planting density on production performance and photosynthetic characteristics of Medicago ruthenica L.

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