种植密度对夏播油莎豆光合特征及光响应影响的研究初报

doi:10.3969/j.issn.2096-1197.2019.05.02

北方农业学报 ›› 2019, Vol. 47 ›› Issue (5): 9-15.doi: 10.3969/j.issn.2096-1197.2019.05.02

种植密度对夏播油莎豆光合特征及光响应影响的研究初报

张向前¹, 方静², 路战远^1,2, 赵小庆^1,2, 任永峰^1,2, 史功赋², 陈立宇¹, 程玉臣¹, 张德健², 刘战勇², 厉雅华²

1.内蒙古自治区农牧业科学院,内蒙古呼和浩特 010031;
2.内蒙古大学,内蒙古呼和浩特 010020

收稿日期:2019-09-04 出版日期:2019-10-20 发布日期:2019-12-11
通讯作者: 路战远（1964—）,男,研究员,博士,博士生导师,主要从事保护性耕作和农田生态方面的研究工作。
作者简介:张向前（1984—）,男,副研究员,博士,主要从事作物栽培、土壤耕作和农田生态方面的研究工作。
基金资助:
内蒙古自治区科技重大项目; 内蒙古自治区科技创新引导项目（KCBJ2018056）

The effect of photosynthesis characteristics and light response of summer planting Cyperus esculentus L. was studied

ZHANG Xiangqian¹, FANG Jing², LU Zhanyuan^1,2, ZHAO Xiaoqing^1,2, REN Yongfeng^1,2, SHI Gongfu², CHEN Liyu¹, CHENG Yuchen¹, ZHANG Dejian², LIU Zhanyong², LI Yahua²

1.Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences,Hohhot 010031,China;
2.Inner Mongolia University,Hohhot 010020,China

Received:2019-09-04 Online:2019-10-20 Published:2019-12-11

摘要/Abstract

摘要： 研究明确夏播油莎豆分蘖后期光合特性的变化规律,为内蒙古中西部地区油莎豆夏播种植提供实践基础。该研究系统分析了2个种植密度下油莎豆分蘖后期的光合日变化和光响应曲线的变化特征。结果表明：油莎豆分蘖后期2种植密度的净光合速率和气孔导度日变化均呈双峰曲线变化趋势,净光合速率2个峰值均以12.5万株/hm²处理的较大,其值为12.16 ,9.49 [μmol/（m²·s）],分别比14.3万株/hm²处理峰值时的净光合速率高出了0.25%,13.93%;12.5万株/hm²处理的日平均气孔导度比14.3万株/hm²处理高0.94%。胞间CO₂浓度呈先降低后升高的单峰曲线变化趋势,日平均胞间CO₂浓度表现为14.3万株/hm²>12.5万株/hm²。蒸腾速率呈倒“V”形变化,日平均蒸腾速率大小为14.3万株/hm²>12.5万株/hm²。利用非直角曲线模拟的最大净光合速率以12.5万株/hm²处理较大,为19.87 [μmol/（m²·s）],比14.3万株/hm²处理高4.97%。模拟的暗呼吸速率12.5万株/hm²处理较大;光饱和点（LSP）和光补偿点（LCP）均表现为14.3万株/hm²>12.5万株/hm²。综合分析2个种植密度下的光合性能变化特征得出,内蒙古中西部地区夏播油莎豆的种植密度以12.5万株/hm²较好。

关键词: 油莎豆, 种植密度, 夏播, 光合日变化, 光响应曲线

Abstract: To study the effect of planting density on the photosynthetic characteristics of summer-sown Cyperus esculentus L.at the late tillering stage,and to provide a practical basis for summer-sown Cyperus esculentus L. in the central and western regions of Inner Mongolia.This study systematically analyzed the effect of 2 planting density on the diurnal variation of photosynthesis and the light response curve in the late tillering stage.The results showed that the diurnal variation of net photosynthetic rate and stomatal conductance in the late tillering stage of Cyperus esculentus L. under different planting densities showed a bimodal curve trend.The two peaks of net photosynthetic rate were the highest under the treatment of 125 000 plants/hm²,with the values of 12.16 [μmol/（m²·s）] and 9.49 [μmol/（m²·s）],respectively,which were higher than those under the treatment of 143 000 plants/hm².The photosynthetic rate was 0.25% and 13.93% higher,repsectively.The average stomatal conductance of 125 000 plants/hm² was 0.94% higher than that of 143 000 plants/hm².The intercellular CO₂ concentration showed a single peak curve change trend of first decreasing and then increasing,and the daily average intercellular CO₂ concentration showed a high level of 143 000 plants/hm²>125 000 plants/hm².The transpiration rate showed an inverted "V" type change,and the average daily transpiration rate was 143 000 plants/hm²>125 000 plants/hm².The maximum net photosynthetic rate simulated by the non-rectangular curve was the maximum with the treatment of 125 000 plants/hm² 19.87 [μmol/（m²·s）],which was 4.97% higher than the treatment of 143 000 plants/hm²,and the simulated dark respiration rate of 125 000 strains/hm² was the maximum.The order of light saturation point （LSP） and light compensation point （LCP） was 143 000 plants/hm²>125 000 plants/hm².Based on the comprehensive analysis of the effects of two planting densities on the characteristics of photosynthetic performance changes,the practical basis for summer sowing of Cyperus esculentus L. was provided.It was preliminarily determined that planting density of 125 000 plants/hm² were better for summer sowing of Cyperus esculentus L. in central and western Inner Mongolia.

Key words: Cyperus esculentus L., Planting density, Summer sowing, Diurnal variation of photosynthesis, Light response curve

中图分类号:

S565

张向前, 方静, 路战远, 赵小庆, 任永峰, 史功赋, 陈立宇, 程玉臣, 张德健, 刘战勇, 厉雅华. 种植密度对夏播油莎豆光合特征及光响应影响的研究初报[J]. 北方农业学报, 2019, 47(5): 9-15.

ZHANG Xiangqian, FANG Jing, LU Zhanyuan, ZHAO Xiaoqing, REN Yongfeng, SHI Gongfu, CHEN Liyu, CHENG Yuchen, ZHANG Dejian, LIU Zhanyong, LI Yahua. The effect of photosynthesis characteristics and light response of summer planting Cyperus esculentus L. was studied[J]. Journal of Northern Agriculture, 2019, 47(5): 9-15.

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种植密度对夏播油莎豆光合特征及光响应影响的研究初报

The effect of photosynthesis characteristics and light response of summer planting Cyperus esculentus L. was studied

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