【摘要】 以Logistic生长模型为基础,应用数学方法推导和建立了油桃叶片生长量及果实生长量的模型,并由此得出叶片和果实的生长速率(RLG和RFG)方程。以温室油桃的叶片和果实生长量为材料,进行较大的抽样量的调查,并建立了温室油桃叶片和果实生长发育的回归方程,实测值和模拟值均表现出油桃叶片生长速度和果实生长速度均呈"双S"曲线,叶片生长速率和果实生长速率均有两个生长峰。(1)叶片的展叶期约为26 d,叶片快速生长,果实缓慢生长,该阶段以营养生长为主。(2)油桃叶片和果实生长曲线均是"双S"曲线,叶片生长速率和果实生长速率均有两个生长峰。叶片生长第1峰(4.86 cm2.d-1)高于第2峰(0.98 cm2.d-1);果实生长第2峰(7.40 cm3.d-1)高于第1峰(1.54 cm3.d-1)。第34天之后果实生长速率加快,叶片生长速率减缓。(3)叶片生长第2峰与果实生长第1峰有一定的重合(第34天),且均为次生长峰。该时期,油桃的营养生长与生殖生长竞争激烈,易发生理性营养缺素症,应提前通过叶面或其他施肥方式补充养分,以防生理性营养缺素症的发生。更多还原

【Abstract】 Based on Logistic growth model,the leaf and fruit growth models of nectarine were established,from which the equations of the rates of leaf and fruit growth were deduced,which were compared with the observed values.The growth curve of the leaf and the fruit presented as a double "S" from the data measured and the data simulated.The rates of leaf and fruit growth exhibited double peak curves.The leaf expansion period was about 26 days with high growth rate,while the rate of fruit growth was slow in this period,therefore,the growth was mainly vegetative.The first maximum rate of leaf growth(4.86 cm2·d-1) was higher than the second one(0.98 cm2·d-1),while the second maximum rage of fruit growth(7.40 cm3·d-1) was higher than the first one(1.54 cm3·d-1).The rate of fruit growth increased and the rate of leaf growth decreased after 34 days.The second maximum rate of leaf growth was coincident with the first maximum rate of fruit growth,all were hypo-peak growth.The reproductive growth and vegetative growth were competitive in the peroid.Nutrient deficiency may occur in this period.Nutrients must be supplemented to prevent the deficiency.更多还原