Crops ›› 2016, Vol. 32 ›› Issue (3): 94-98.doi: 10.16035/j.issn.1001-7283.2016.03.018

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Effects of Biochar on Chlorophyll Fluorescence at Full Heading Stage and Yield Components of Rice

Chen Ying,Zhang Manli,Liu Xianping,Dai Guijin,Hou Shougui   

  1. Liaoning Rice Institute,Shenyang 110101,Liaoning,China
  • Received:2016-01-03 Revised:2016-03-23 Online:2016-06-15 Published:2018-08-26

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Abstract:

The pot experiment was carried out to study the effects of biochar on chlorophyll fluorescence and yield components of rice. The results showed that the maximum photochemical efficiency (Fv/Fm), actual photochemical efficiency (Yield), photochemical quenching (qP) and non-photochemical quenching (NPQ) under the C2F treatment were higher than those under the others. Compared with the control treatment (F), the yield per hill of the C1F treatment was increased by 8%, while that of the C3F treatment was reduced about 15%. The data indicated that the moderate amount of biochar could improve the light energy conversion efficiency, potential activity and open proportion of PSⅡ reaction center. The higher NPQ in the biochar treatments was beneficial to reduce the damage of environmental stress on photosynthetic apparatus, and to enhance the stability of the photosynthetic reaction center system. Thus, the photosynthesis ability of rice was enhanced, and then the rice grain filling was improved, which would result in the increase of filled grains per panicle and yield.

Key words: Biochar, Rice, Chlorophyll fluorescence, Yield components

Fig.1

Effect of the different treatments on Fv/Fm at rice full heading stage The different small figures indicate the significant difference at 5% level, the same below"

Fig.2

Effect of the different treatments on the Yield value at rice full heading stage"

Fig.3

Effect of the different treatments on qP at rice full heading stage"

Fig.4

Effect of the different treatments on NPQ at rice full heading stage"

Table 1

Yield components of rice under the different treatments"

处理
Treatments		 每穴穗数(个/穴)
Panicles per hill		 穗长(cm)
Length of panicle		 每穗实粒数(粒/穗)
Full grain number per panicle		 结实率(%)
Seeding set rate		 千粒重(g)
1000-grain weight		 每穴谷重(g)
Yield per hill
F(CK) 10.3a 17.5a 135.9b 96.9a 25.8a 36.2ab
C1F 10.1a 17.7a 154.6ab 97.3a 25.5a 39.1a
C2F 9.6a 18.1a 163.2a 97.7a 25.9a 35.4ab
C3F 8.8b 17.9a 160.0a 96.5a 25.6a 30.9b
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