不同栽培条件下水稻分蘖角度动态变化分析

Analysis on Dynamic Change of Tiller Angle under Different Cultivation Conditions in Rice

以3个不同穗型品种为试材,研究不同栽培条件对水稻分蘖角度的影响。结果表明:不同插秧深度条件下的分蘖角度在分蘖初期到乳熟期时变化显著,0.5cm>1.0cm>1.5cm;不同肥力水平下,分蘖角度:1.5g>1.0g>0.5g;不同水层条件下,分蘖角度变化不明显。通过试验来探讨分蘖角度的定义和测定时期,分析分蘖角度与行距的关系。建议用公式:tgα=R/2H来描述分蘖角度,并以此公式来确定合理的栽培密度。

The effect of different cultivation on tiller angle was studied by using 3 varieties with different panicle types. The result showed： During the beginning of tiller period and milky period the change of tiller angle under different transplant rice seeding depth （TRSD） was significance： 0.5cm〉1.0cm〉1.5cm; Tiller angle under different fertility levels： 1.5g〉1.0g〉0.5g; Different water depth had little infection to tiller angle. According to experiment the conception and mensuration of tiller angle were discussed. The relationship between tiller angle and row space was studies. The formula of tiller angle was suggested： tgα=R/2H, and used it to design the better plant density.