Effects of Different Biochar and Silicon Treatments on Lodging Resistance Properties and Yield of Rice
Received date: 2022-07-14
Online published: 2022-11-17
The effects of the combined application of biochar and silicon fertilizer on rice lodging resistance, stalk strength, chemical substance content and enzyme activity were studied with Koshihikari as the experimental material. The results showed that peanut shell biochar and silicon fertilizer application significantly reduced internode length, increased culm internode diameter, significantly reduced the lodging index and lodging area rate of rice, and improved the starch content, lignin content and cellulose content and lignin key enzyme activities. Among them, 7.5 t/hm2 biochar and 45 kg/hm2 silicon fertilizer as basal application and foliar spraying 0.02% silicon fertilizer were the optimal carbon-silicon combination application. This treatment significantly enhanced the lodging resistance and yield of Koshihikari, the lodging index of the first, second and third internode decreased by 36.42%, 30.19% and 26.83% respectively compared with the control. Correlation analysis showed that the lodging index and lodging area rate of rice were significantly negatively correlated with the strength of the stem; the starch content, cellulose content, and lignin content in stems were significantly or extremely significantly positively correlated with stem strength, and significantly or extremely significantly negatively correlated with lodging index and lodging area rate; the lignin content was significantly positively correlated with the activities of PAL, TAL, 4CL and CAD. The research results could provide scientific basis and technical support for lodging-resistant cultivation of high-quality rice Koshihikari.
Key words： rice; biochar; silicon fertilizer; lodging resistance
WU Yunyan . Effects of Different Biochar and Silicon Treatments on Lodging Resistance Properties and Yield of Rice[J]. China Rice, 2022 , 28(6) : 49 -53 . DOI: 10.3969/j.issn.1006-8082.2022.06.010
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