Scientia Agricultura Sinica ›› 2020, Vol. 53 ›› Issue (19): 3942-3953.doi: 10.3864/j.issn.0578-1752.2020.19.008

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• SPECIAL FOCUS: HIGH SOLAR AND HEAT RESOURCES EFFICIENCY OF WHEAT-MAIZE CROPPING SYSTEM • Previous Articles     Next Articles

Effects of Row Spacing and Mulching Reflective Film on the Yield and Light Utilization of Summer Maize

BAI Jing(),ZHANG ChunYu,DING XiangPeng,ZHANG JiWang,LIU Peng,REN BaiZhao,ZHAO Bin()   

  1. College of Agriculture, Shandong Agricultural University/State Key Laboratory of Crop Biology, Tai’an 271018, Shandong
  • Received:2020-05-12 Accepted:2020-08-24 Online:2020-10-01 Published:2020-10-19
  • Contact: Bin ZHAO E-mail:921279941@qq.com;zhaobin@sdau.edu.cn

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Abstract:

【Objective】In recent years, it is the limitation for summer maize to face the less light radiation during the growing season, and the light deficiency has become the main limiting factor affecting the production of maize. In this study, the row spacing under high density of maize was adjusted appropriately to improve the light in the canopy and the interior of the population and to alleviate the influence of shading caused by high density, so as to lay a foundation for further improving the yield.【Method】This experiment took Zhengdan 958 as the experimental material under field conditions in 2018-2019, and there were two different planting densities, which were 67 500 plants/hm2 and 82 500 plants/hm2, and three row spacing forms (60+60, 80+40, 100+20), with mulching reflective film (FM) and no film treatment (NM). The effects of mulching reflective film and row spacing on light energy utilization and yield of summer maize were studied. 【Result】As the density increases, the maize yield increased. There was no significant difference in the yield of “60+60” and “80+40” row spacing configurations when the density of 67 500 plants/hm 2 was higher than that of “100+20” row spacing configurations under the condition of mulching reflective film and no film. But at 82 500 plants/hm 2 density, the row spacing configuration of “FM80+40” under the mulching treatment could effectively improve the light environment within the population and made the distribution of light energy in the canopy more reasonable, and significantly increase the dry matter accumulation, LAI, canopy light interception rate, Pn and chlorophyll content; Compared with “FM60+60” and “FM100+20” treatments, the two-year average yield of which were increased by 6.6% and 10.8%, respectively. The yield of “NM80+40” row spacing was 5.8% and 8.7% higher than that of “NM60+60” and “NM100+20” row spacing, respectively, and the yield of “FM80+40” was 5.1% higher than that of “NM80+40”.【Conclusion】Under the density of 82 500 plants/hm 2, “80+40” row spacing arrangement supplemented by mulching reflective film could significantly improve the photosynthetic characteristics of summer maize, increase the reflectance of transmitted light at the lower part, and then increase the illumination of the middle and lower part of leaves, prevent premature aging of leaves, and improve photosynthetic capacity. Therefore, this treatment was an ideal cultivation mode to achieve high yield of summer maize

Key words: summer maize, yield, light energy utilization, row spacing, mulching reflective film

Table 1

Nutrition content in soil"

试验地点
Test location		 有机质
Organic matter
(g·kg-1)		 全氮
Total N
(g·kg-1)		 速效氮
Available N
(mg·kg-1)		 速效磷
Available P
(mg·kg-1)		 速效钾
Available K
(mg·kg-1)
黄淮海区域玉米技术创新中心
Huang-huai-hai regional maize technology innovation center		 10.65 0.76 56.87 35.76 127.41

Fig. 1

Effects of row spacing and mulching reflective film on the yield of summer maize L: Normal density; H: High density. Different small letters indicate significant at 0.05 level. The same as below"

Table 2

Variance analysis for yield of summer maize"

变异来源
Sources of variance		 密度
Density		 行距配置
Row spacing		 覆反光膜
Mulching reflective film		 密度×行距配置
Density×Row spacing		 密度×覆反光膜
Density×Mulching reflective film		 行距配置×覆反光膜
Row spacing×Mulching reflective film		 密度×行距配置×覆反光膜
Density×Row spacing×Mulching reflective film
显著水平
Significance level		 ** ** ** ** * * *

Fig. 2

Effect of row spacing and mulching reflective film on dry matter accumulation of summer maize V12: Large bell stage; VT: Flowering stage; VT+20: 20 days after flowering stage; VT+40: 40 days after flowering stage; VT+60: 60 days after flowering stage. The same as below"

Fig. 3

Effect of row spacing and mulching reflective film on LAI of summer maize"

Fig. 4

Effect of row spacing and mulching reflective film on chlorophyll of summer maize"

Fig. 5

Effect of row spacing and mulching reflective film on PAR capture ratio of summer maize"

Fig. 6

Effect of row spacing and mulching reflective film on reflection ratio of summer maize"

Fig. 7

Effect of row spacing and mulching reflective film on Pn of summer maize"

Fig. 8

Effect of row spacing and mulching reflective film on the Pn of the fourth leaf of panicle leaf of summer maize"

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