Effects of No-tillage Years and Re-tillage Times on Soil Bulk Density and Rice Growth in Paddy Fields

Hu Huaizhou; Hu Bangyou; Zhang Xulin; Liu Zhongcheng; Liu Junyan; Ci En

doi:10.11924/j.issn.1000-6850.casb20190900668

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Chin Agric Sci Bull ›› 2020, Vol. 36 ›› Issue (10) : 1-7. DOI: 10.11924/j.issn.1000-6850.casb20190900668

Research article

Effects of No-tillage Years and Re-tillage Times on Soil Bulk Density and Rice Growth in Paddy Fields

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Abstract

To explore the effects of different no-tillage years and re-tillage times on soil bulk density and rice growth in paddy fields, the research includes no-tillage for 1 to 10 years of paddy field and re-tillage once, re-tillage twice and re-tillage 3 times after no-tillage for 3 to 6 years of paddy field. The results showed that the soil bulk density of no-tillage soil was always higher than that of conventional tillage soil at surface soil and sublayer soil, with the increase of no-tillage time, soil bulk density increased. The soil bulk density significantly increased after 3-year no-tillage compared to that of conventional tillage (P<0.05). With the increase of re-tillage time, soil bulk density gradually decreased. In the paddy fields with no-tillage for 1 to 5 years, the highest seedlings, effective panicles and yield of rice under no-tillage cultivation were higher than that of conventional tillage cultivation. The tillering ability and yield of rice treated with 6-year no-tillage were relatively flat and stable and that of rice treated after 7-year no-tillage decreased significantly. The tillering ability and yield of rice in paddy fields under the re-tillage treatment were always lower than that of the corresponding no-tillage treatment, and the gap gradually widened with the increase of re-tillage times. The tillering ability and yield of rice treated with no-tillage for 7 years were the same as that treated with the corresponding re-tillage once after no-tillage for 6 years. In summary, 6-year no-tillage treatment is the best measure for paddy production in the study area, when the continuous no-tillage of paddy fields exceeds the optimum years, it is necessary to re-tillage the paddy fields once.

Key words

paddy field / no-tillage year / re-tillage / soil bulk density / yield

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Hu Huaizhou , Hu Bangyou , Zhang Xulin , et al . Effects of No-tillage Years and Re-tillage Times on Soil Bulk Density and Rice Growth in Paddy Fields[J]. Chinese Agricultural Science Bulletin. 2020, 36(10): 1-7 https://doi.org/10.11924/j.issn.1000-6850.casb20190900668

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Footnotes

The authors have declared that no competing interests exist.

作者已声明无竞争性利益关系。

Funding

(2018YFD0800600)

(41977002)

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