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1.主要试验地点及条件(1)中种集团承德长城种子有限公司:河北省北部,无霜期159天,年降雨量500-600mm,日照时数2695小时,年均温9.0℃。试验地土壤为粘性土。(2)内蒙古呼和浩特市赛罕区林业局:内蒙古中部,温带大陆性季风气候。无霜期130-150天,年降雨量350-500mm,日照时数2900-30
1. The main test sites and conditions (1) China Seed Group Chengde Great Wall Seeds Co., Ltd.: northern Hebei Province, 159 days frost-free period, annual rainfall 500-600mm, sunshine hours 2695 hours, annual average temperature 9.0 ℃. Soil test for the clay. (2) Saihan Forestry Bureau, Hohhot, Inner Mongolia: Central Inner Mongolia with temperate continental monsoon climate. Frost-free period 130-150 days, annual rainfall 350-500mm, sunshine hours 2900-30