大棚油桃生长发育的特点

调查了油桃主要栽培品种曙光、丹墨、早红艳和千年红在大棚内生长发育情况,结果表明:(1)长梢生长有3个高峰期,第一生长高峰比露地明显延后25d,主要是由于棚内低温寡照所致。(2)果实膨大遵从“双S”规律,第一膨大阶段比露地明显延长,硬核期比露地推迟16d。果实成熟期比露地推迟19d。(3)干周粗度与深层根系的须根量呈正相关,相关系数为r=0.86509,达显著水平。根系量越多,分布越深,树势就越旺。树势过旺,会影响树冠中下部短枝的花芽分化。

Growth characteristics of nectarine cultivars in greenhouse

Through investigation of the growth of Shuguang, Danmo, Zaohongyan and Qiannianhong nectarine cultivars, it was revealed that the changes of environmental factors in greenhouse had a distinctive effect on the growth and development of fruit. The results showed that: (1) the growth graph of the long shoots exhibited tri-peak distribution. Compared with those in open field, the period of first rapid growth was postponed by about 25 days; the main reason was the low temperature and poor light;(2) Growth curve of the fruit exhibited bimodal distribution. Fruit initial rapid expansion was postponed distinctly compared with that in open field. The hardening time of the endocarp and the maturity time were postponed by 16 and 18 days respectively;(3) The circle of trunk has a positively correlation with the number of the fibre, the R=0.86509,which reached the significant level(P=0.05), the more number and deeper the root, the more vigorous the tree's growth. But excessively vigorous of the tree's growth would affect the flower bud development of the short fruit bearing shoot located at the lower position of the canopy.