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罗伯逊脐橙(简称罗脐)原产美国,它果大、味甘、无核、风味佳,是市场上的畅销品种,由于它对温度、湿度、光照等气象条件要求严格,其栽培地域受到限制。湖北省秭归县属西陵峡区,境内山峦起伏,长江横贯,香溪缠绕,由于峡谷和水体的共同作用,形成了发展脐橙种植的优越环境。彭家坡地处秭归城北,位于南北走向峡谷的东坡(约40°)之南端,山体海拔约900米,该地以海拔150米到500米之间辟有阶梯式桔园种植脐橙。 1984年,为考察脐橙品种对不同海拔高度的气候生态适应性,我们选了150米、250米、350米三个测点(简称A、B、C),对“罗脐—35”进行了物候观测。 “罗脐—35”系1979年彭家坡由县柑桔试验站引入,嫁接砧木为拘桔。选择的测株长势良好,树龄五年,定植三年。观测方法以《亚热带东部丘陵山区经济林木物候观测方法》为蓝本,作适当修改。A、
Robertson Navel Orange is native to the United States. Its fruit is large, sweet, seedless and good in flavor. It is the best-selling product in the market. Due to its strict weather conditions such as temperature, humidity and light, Robertson’s Navel Orange . Xilingige County, Hubei Province is a Xiling Gorge area, the territory of the ups and downs, the Yangtze River runs through, Xiangxi winding, due to the gorge and the combined effect of water, the formation of a favorable environment for the development of navel orange cultivation. Located at the north end of Zigui, Pengjiapo is located at the southern end of the east slope (about 40 °) to the canyon from north to south. The mountain is about 900 meters above sea level. There, the orange plantations are planted in an orange grove between 150 and 500 meters above sea level. In 1984, in order to investigate the climatic and ecological adaptability of navel orange varieties to different altitudes, we selected three measuring points of 150m, 250m and 350m (abbreviated as A, B and C) and conducted “Navel-35” Phenology observation. “Lo na -35” Department of Pengjiapo County in 1979 by the county citrus test station introduction, grafting rootstock for the ban orange. Selected strains grow well, age five years, planting three years. The observational method is based on the method of observing the phenophases of economic forests in the hilly and mountainous regions of the eastern subtropics and makes appropriate changes. A,