不同栽培措施对红叶石楠红叶期的影响研究

以2a生红叶石楠为材料，研究育苗方式、光照奈件、修剪强度、栽植密度、供水量、施肥量等不同栽培措施对红叶石楠红叶期及其叶片颜色的影响．研究结果表明：①红叶石楠组培苗的红叶期比扦插苗长；②红叶期随着光照强度增强而变长；③适当增加红叶石楠的修剪强度，有助于延长红叶期；④在红叶期，栽植密度越小，植株下部叶片颜色越深；⑤每隔10d左右浇一次水，有利于延长红叶期；⑥每隔10～15d施一次含3％左右的氮肥，有助于延长红叶期．

The Impact of Different Cultivation Measure on Red-leaved Period of Photinia serrulata

Taking ：2-year red-leaved Photinia serrulata as materials, the study puts focus on the impact of diverse cultivation measures on red-leaved period and leaf color including seedling means, illuminative condition, pruning intensity, planting density, water supply and fertilizer amount. The results indicate as followed ： ①the red- leaved period of tissue cultured seedling is longer than that of cutting seedling ; ②the smaller the planting density is, the deeper the color of leaves at lower position is;③the red-leaved period tends to be extended under such conditions namely strong illumination, proper increase of pruning, watering every other 10 days, and applying about 3% nitrogenous fertilizer every other 10 - 15 days.