适宜河南省发展的苹果品种和矮化砧木一、根据我国对发展苹果引种试栽的结果表明，河南省的生态特点是：年均温度１３１５℃，大于或等于１０℃的活动积温３７００４９００℃，４９份的气温为１４２８℃，７月份气温为２７２８℃１月份气温为－２１５℃，无... Appropriate for the development of apple varieties and dwarfing rootstock in Henan Province A, according to China’s development of apple introduction of test results show that the ecological characteristics of Henan Province are: the average annual temperature 13-15 ℃, greater than or equal to 10 ℃ active accumulated temperature 3700 4900 ℃, 4  9 copies of the temperature of 14  28 ℃, July temperature of 27  28 ℃ January temperature of -2  1  5 ℃, no ...