Effects of Soil Water Content After Field Drying on Rice Effective Tillers

doi:10.11924/j.issn.1000-6850.casb16050037

Abstract

Abstract: In order to investigate the relationship between effective tillers of rice and soil water content, experiments were carried out with early rice ‘Ganxin 203’ and late rice ‘Wufengyou T025’, the treatment without field drying was used as CK, four field drying treatments were conducted, which were field drying for 5 days (W₁) and 10 days (W₁) when tillers came to 70% expected panicles, field drying for 5 days (W₃) and 10 days (W₄) when tillers came to 80% expected panicles, soil volumetric water content in 5, 10 and 20 cm depth was monitored by soil moisture recorder, the effect of soil water content under different field drying treatments was investigated. The results showed that treatment W₁, W₃, and W₄ of early rice and W₂ and W₃ of late rice could reduce ineffective tillers and increase earbearing tiller percentage in late tillering stage. The treatment effect of early rice was W₄> W₁> W₃> CK> W₂, and that of late rice was W₂> W₃> W₁> CK> W₄. The relationship between effective tillers of per plant, earbearing tiller percentage and soil volumetric water content in 5, 10 and 20 cm depth could be fitted by the quadratic curve. Effective tiller number and earbearing tiller percentage reached the highest when 0-20 cm soil volumetric water content reached 47%-55% at late tillering stage after field drainage and drying.

CLC Number:

S511

Yang Jun,Huang Shue,Zhang Jinen,Zhang Chonghua and Wang Shangming. Effects of Soil Water Content After Field Drying on Rice Effective Tillers[J]. Chinese Agricultural Science Bulletin, 2016, 32(24): 36-42.

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