不同高油花生品种(系)油分积累特性的模拟研究

为了准确了解油用型花生籽仁油分积累特性, 筛选适合描述花生籽仁油分累积特性的生长模型, 以6个高油花生品种(系)为材料, 用Richards、Logistic和Gompertz方程拟合了花生籽仁油分累积特征曲线。研究结果表明, Richards方程能够较好地拟合不同花生品种(系)的油分累积特性, 其拟合度优于Logistic和Gompertz方程。不同花生品种(系)间油分累积特性的比较研究结果表明, 籽仁脂肪含量的变化过程基本可以划分为初始积累、快速积累和稳定积累3个阶段, 油分积累主要集中在前2个阶段。提高含油量有提高油分积累速率和延长油分积累持续时间2策略。提高籽仁油分最大积累速率、初始积累阶段油分积累量和快速积累阶段油分积累量是增加籽仁含油量的关键。

Simulation on Oil Accumulation Characteristics in Different High-Oil Peanut Varieties

To investigate accumulation characteristics of seed oil in different oil-used peanut varieties and screen a suitable growth equation to describe the seed oil accumulation, six high oil varieties were used and tested by the Richards, Logistic and Gompertz equations. The results showed that the Richards equation was more suitable for simulating oil accumulation process than the other growth equations in peanut. The Richards could improve fitting effect among the three models. Via comparing the accumulation characteristics of seed oil content in different oil-used peanut cultivars, the accumulation of seed oil in peanut could be divided into three stages, which were initial accumulation stage, fast accumulation stage and steady accumulation stage. There were two ways for oil-used peanut cultivars to increase oil content: increasing the rate of seed oil accumulation and extending the time of seed oil accumulation process. From the results of parameters of growth equation, the important strategies in increasing the seed oil content are as follows: (1) Enhancing the maximum rate of oil accumulation; (2) Increasing the oil accumulation at the initial accumulation stage; (3) Increasing the proportion of oil accumulation at fast accumulation stage.