摘要
北疆棉花群体光合速率 (CAP)日变化及生育期CAPmax变化数据点可采用多项式函数f(t)=a0 +a1t+a2 t2 +… +antn拟合 ,微积分求解各棉花品种蕾期、花期、花铃期、吐絮期净CAP与净CR变化的特征值。分析特征值 ,表明日CO2 积累的 85.9%～ 93.7%,平均 90 .6%是在日光合速率高值期内完成的。开花前后是棉花生育期间群体光合速率高值持续期 (PAD)开始的标志 ,吐絮前后是棉花PAD结束的标志。棉花PAD是棉花栽培管理的重点时期。棉花品种群体光合速率 (CAP)
Polynomial regression fit for the diurnal variation of CAP during cotton growth period in North Xinjiang.The function expression is f(t)=a\-0+a\-1t+a\-2t\+2+…+a\-nt\+n,adopting quadrature and differential coefficient obtain cotton net photosynthesis or net respiration parameter.Analysis of parameter indicates that 85.9%～93.7% of the assimilation amount of carbon dioxide was accumulated in the photosynthetic active duration(PAD).Blossom is the beginning of cotton PAD,and the beginning of open boll stage is the end of cotton PAD,so the PAD is the key stage in cotton cultivation.The difference of cotton CAP is mostly in open boll stage.
出处
《石河子大学学报（自然科学版）》
CAS
1999年第S1期31-39,共9页
Journal of Shihezi University(Natural Science)
关键词
棉花
群体光合速率(CAP)
分析
北疆
cotton
canopy apparent photosynthesis characteristics
analysis
North Xinjiang
