施肥对旱地花生荚果发育的影响

Effect of Fertilizer Application on the Pod Development of Dryland Peanut

试验研究了不同施肥水平下旱地花生荚果发育动态,结果表明,旱地花生荚果重量和体积增长过程呈“慢—快—慢”变化,可用 Logistic方程拟合,荚果重量最大增长日为幼果形成后 43~48 d,最大增长速率为0.3791~0.5947g/株·d;荚果体积最大增长日为幼果形成后36~39 d,最大增长速率为0.8487~1.6684 cm3/株·d,荚果重量和体积快速增长期持续 20~30 d,随施肥量的增加,荚果重量和体积最大增长日出现时间推迟。

The study focused on pod development of dryland peanut by different treatments of fertilizer application. The results showed that pod weight and pod volume increasing could be characterized as a 'slow-rapid-slow' rhythm. It's cumulative dynamics was simulated by a Logistic equation. The growth rate of pod weight had a peak of 0.3791~0.5947 g/plant·d at 43~48day after emergence, and the peak (0.8487~1.6684 cm^3/plant·d)of growth rate of pod volume occurred at 36~39day after emergence, the rapid growth period was 20~30days. Date of peak growth rate of pod weight and pod volume had a delayed process with an increase of the amount of fertilizer application.