摘要
陕北丘陵沟壑区龙王帽大扁杏根系集中分布于30～80cm的土层和距树干50～180cm的范围内,1a内有3个生长高峰,其中7月生长量最大.成龄树延长枝有2个生长高峰,结果枝有1个生长高峰.花期及幼果期不遇霜冻时的坐果率为15.49%,遭遇霜冻时为0.63%.果实发育呈 慢-快-慢-快 的 双S 曲线,无采前落果.果实出核率12.6%,出仁率为3.6%.不同海拔、坡向地块的花期差异较大,阳坡的早于阴坡,低海拔早于高海拔.花期及幼果期频繁出现的霜冻,对大扁杏的坐果影响较大.
In loess hilly and gully region, the roots of Longwangmao almond-apricot horizontally distributes from 50 cm to 180 cm around the trunk and vertically distributes in subsoil from 30 cm to 80 cm principally. The roots have three growing peaks in a year and July-peak is the tallest one. Extending shoots have two growing peaks and fruit shoots have one growing peak in a year. Fruiting percentage of Longwangmao almond-apricot is 15.61% when florescence and young fruit term don't meet frostbite, or fruiting percentage is about 0.63%. The course of fruit growing shows 'slow-fast-slow-fast' liking 'double S'. In this region almond-apricot doesn't have abscission of fruits before maturity. 100 kg fruits of Longwangmao almond-apricot can produce 12.6 kg stone and 3.6 kg almond. The florescence of sunny slope-land is earlier then shady slope-land and low land is earlier then high land. On account of frostbite, almond-apricot has little yield in many years.
出处
《西北植物学报》
CAS
CSCD
2004年第2期226-230,共5页
Acta Botanica Boreali-Occidentalia Sinica
基金
中国科学院知识创新工程项目 KZCXI-06
国家 十五 科技攻关项目 2001BA508B17
关键词
大扁杏
生长习性
监测
陕北丘陵沟壑区
almond -apricot
growth characteristic
observation
Hill and Gully Region of northern Shaanxi
