摘要
以６个早籼稻品种为材料，分３期播种，使它们在不同温度下灌浆结实。用Ｒｉｃｈａｒｄｓ方程配合各处理的籽粒灌浆过程，决定系数Ｒ＿２绝大多数都达到０．９以上，配合较好，根据Ｒｉｃｈａｒｄｓ方程，求出起始灌浆势Ｒ＿０、灌浆持续时间ｔ、平均灌浆速率、最大灌浆速率ｖ＿ｍ和达到最大灌浆速率的时间ｔ＿ｍ等５个籽粒灌浆特征参数，进而研究稻米垩白度与这些籽粒灌浆特征参数的关系。结果表明，稻米垩白度与这些籽粒灌浆特征参数一般呈开口向上的抛物线关系，只有极少数特例。根据所得回归方程，求出了各品种稻米垩白度最小时的籽粒灌浆特征参数最适值。笔者认为，采取适当措施调节籽粒灌浆过程，有可能减少垩白的发生。
Six indica fice varieties were sown at three seasons so that their grains were allowed to befilled under different temperatures.the filling grains of each treatment were weighed dynami-cally and the grain-filling processes were simulated with the Rechaxds equations. From eachequation five grain-filling parameters,i.e. the initial filling potential(R0),the fiiling dura-tion(t),the average filling rate(v),the maximum filling rate(vm)and days from heading tothe date of vm(tm),were derived. Studies showed that the relations between chalkiness(y)and each of the five parameters(x)could be quantified with parabolas in which chalkiness wasreferred to as dependent variable. Each filling parameter had an optimum value at which thechalkiness could reach its minimum level.It seemed that the chalkiness could more or less bereduced by adjusting the grain filling patterns through appropriate techniques.
出处
《江西农业大学学报》
CAS
CSCD
1996年第4期387-394,共8页
Acta Agriculturae Universitatis Jiangxiensis
基金
国家自然科学基金
关键词
水稻
垩白
籽粒灌浆
参数
paddy rice
chalkiness
grain filling parameters
the Rechards equation
