Differences in photosynthetic performance of leaves at post-flowering stage in different cultivation modes of summer maize (Zea mays L.)
LI Jing, WANG Hong-Zhang, LIU Peng,*, ZHANG Ji-Wang, ZHAO Bin, REN Bai-ZhaoCollege of Agriculture, Shandong Agricultural University / State Key Laboratory of Crop Biology, Tai’an 271018, Shandong, China
This study was supported by the National Key Research and Development Program of China.2016YFD0300106 This study was supported by the National Key Research and Development Program of China.2018YFD0300603 the National Natural Science Foundation of China.31771713 the National Natural Science Foundation of China.3207150188 the Shandong Province Key Agricultural Project for Application Technology Innovation.SDAIT-02-08
Abstract Photosynthesis plays an important role in crop growth and yield formation. Different cultivation patterns can significantly affect the photosynthetic performance of leaves at post-flowering stage in summer maize. In order to explore the effects of different cultivation modes on the photosynthetic performance of summer maize leaves at post-flowering stage, field experiments were carried out with Denghai 605 maize hybrid variety as experimental material from 2018 to 2019 in Tai’an, Shandong, China. With the local farmer management mode (FP) as the control, the super-high-yield cultivation mode (SH) and high-yield and high-efficiency cultivation mode (HH) by comprehensively optimizing the planting density, fertilizer planting and management mode were set in this study. Leaf area index, chlorophyll content, gas exchange parameters, rapid chlorophyll fluorescence induction kinetic curve (OJIP) were evaluated, which indicated significant differences in biomass of different cultivation modes at maturity stage. Compared with FP, the biomass of SH and HH increased by 27.77% and 7.43%, respectively, and the population biomass at post-flowering stage of HH increased significantly as well. Besides, the photosynthetic rate all declined in different cultivation modes, reaching the highest degree of decline on the 30th day at post-flowering stage (R1+30 d). In contrast with FP, the net photosynthetic rate (Pn) of SH and HH increased at post-flowering stage stage (R1) by 21.63% and 12.96%, respectively, and on the 30th day (R1+30 d) at post-flowering stage by 35.37% and 12.37%, respectively, which could maintain a higher level of photosynthetic capacity. In addition, these results revealed that the differences of net photosynthetic rate among the different cultivation modes were caused by non-stomatal factors. The stomatal conductance (Gs) of SH and HH was increased at the silking stage by 18.36%, 16.66%, 26.16%, and 10.74%, respectively, and while on the 30th day at post-flowering stage intercellular carbon dioxide (Ci) declined by 12.85%, 7.34%, 14.08%, and 9.75%, respectively. Compared with FP, Wk and Vj of SH and HH significantly decreased, indicating that SH and HH apparently improved the performances of both electron donor and acceptor sides of electron transport chain in PSII reaction center, the quantum yield of electron transfer (φE0), the electron transfer ability as well as the reaction center activities of PSII and the coordination between PSI and PSII. In conclusion, SH and HH effectively improved the photosystems performance, increased the net photosynthetic rate, and prolonged duration of high photosynthesis rate, resulting in the increase of the population biomass and high yield. Keywords:summer maize;cultivation modes;photosynthetic performance;chlorophyll fluorescence parameters
PDF (710KB)元数据多维度评价相关文章导出EndNote|Ris|Bibtex收藏本文 本文引用格式 李静, 王洪章, 刘鹏, 张吉旺, 赵斌, 任佰朝. 夏玉米不同栽培模式花后叶片光合性能的差异[J]. 作物学报, 2021, 47(7): 1351-1359. doi:10.3724/SP.J.1006.2021.03051 LI Jing, WANG Hong-Zhang, LIU Peng, ZHANG Ji-Wang, ZHAO Bin, REN Bai-Zhao. Differences in photosynthetic performance of leaves at post-flowering stage in different cultivation modes of summer maize (Zea mays L.)[J]. Acta Crops Sinica, 2021, 47(7): 1351-1359. doi:10.3724/SP.J.1006.2021.03051
SH: 超高产模式; HH: 高产高效模式; FP: 农户管理模式; R1: 吐丝期; R6: 成熟期。图中不同小写字母表示不同处理间差异达0.05显著水平。 Fig. 2Effects of cultivation mode on biomass in summer maize
SH: super high yield mode; HH: high-yield and efficient mode; FP: farmer management mode; R1: silking stage; R6: maturity stage. Bars superscripted by different lowercase letters are significantly different between the treatments at P < 0.05.
SH: 超高产模式; HH: 高产高效模式; FP: 农户管理模式; R1: 吐丝期; R1+15: 吐丝后15 d; R1+30: 吐丝后30 d; R1+45: 吐丝后45 d。 *和**分别表示在0.05和0.01水平上处理之间差异显著。不同小写字母表示P < 0.05差异显著。 Fig. 3Effects of cultivation modes on gas exchange parameters of summer maize leaves at post-flowering stage
SH: super high yield mode; HH: high-yield and efficient mode; FP: farmer management mode; R1: silking stage; R1+15: 15 days after silking stage; R1+30: 30 days after silking stage; R1+45: 45 days after silking stage. * and ** indicate significant differences at P < 0.05 and P < 0.01, respectively. Different lowercase letters indicate significant difference at P < 0.05 among the treatments.
Table 3 表3 表3夏玉米不同栽培模式花后比叶重、叶面积指数及叶绿素含量的差异 Table 3Differences of specific leaf weight, leaf area index and chlorophyll content at post-flowering stage under different cultivation modes in summer maize
年份 Years
处理 Treatment
比叶重 Specific leaf weight (mg cm-2)
叶面积指数 Leaf area index
叶绿素a含量 Chlorophyll a (mg dm-2)
叶绿素b含量 Chlorophyll b (mg dm-2)
叶绿素a/b Chlorophyll a/b
R1
R1+30 d
R1
R1+30 d
R1
R1+30 d
R1
R1+30 d
R1
R1+30 d
2018
SH
4.75 a
4.38 a
6.2 a
5.3 a
5.53 a
5.04 a
2.70 a
2.31 a
2.04 a
2.16 a
HH
4.63 ab
4.34 ab
5.4 b
4.8 b
5.21 b
4.77 b
2.66 a
2.26 ab
1.95 b
2.11 ab
FP
4.53 b
4.11 b
4.8 c
4.5 c
5.06 b
4.59 c
2.63 a
2.24 b
1.92 b
2.05 b
2019
SH
4.69 a
4.39 a
7.1 a
6.6 a
5.42 a
5.01 a
2.71 a
2.35 a
1.99 a
2.13 a
HH
4.55 ab
4.30 a
6.1 b
5.5 b
5.18 b
4.71 b
2.67 a
2.25 ab
1.94 b
2.09 ab
FP
4.38 b
4.16 ab
5.0 c
4.6 c
5.04 c
4.52 c
2.66 a
2.21 b
1.90 b
2.04 b
处理和缩写图3。同组数据后不同小写字母表示处理间差异达0.05显著水平。 Treatments and abbreviations are the same as those given in Fig. 3. Values followed by different lowercase letters within a column are significantly different between the treatments at P < 0.05.
处理和缩写同图3。图中不同小写字母表示不同处理间差异达0.05显著水平。 Fig. 4Effects of cultivation modes on reaction center performance of photosystem II in summer maize leaves
Treatments and abbreviations are the same as those given in Fig. 3. Bars superscripted by different lowercase letters are significantly different between the treatments at P < 0.05.
处理和缩写同图3。图中不同小写字母表示不同处理间差异达0.05显著水平。 Fig. 5Effects of cultivation modes on Wk and Vj in summer maize
Treatments and abbreviations are the same as those given in Fig. 3. Bars superscripted by different lowercase letters are significantly different between the treatments at P < 0.05.
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