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杂草的种类分布,和地势高低、土质、耕作习惯、轮作制度等有关。遵义县地处北纬27°至27°50′,东经106°10′至107°10′南跨乌江,北界娄山。平均海拔800～1000米,属丘陵山区,年均温15℃左右,无霜期280天以上,年降雨量1000mm左右,气候温和,雨量充沛,为作物生长创造了有利条件,同样对杂草生长也有利。全县耕作制以一年两熟即以稻油、稻麦、稻肥(绿肥)为主。水稻种植面积60余万亩,是黔北主要稻区之一。而杂草往往伴随一定作物而形成一定的群体,
Weeds species distribution, and the topography, soil quality, farming habits, rotation system and so on. Zunyi County is located north latitude 27 ° to 27 ° 50 ’, longitude 106 ° 10’ to 107 ° 10 ’south across the Wujiang, Loushang North Boundary. The average elevation of 800 to 1,000 meters, is a hilly mountain area, with an average annual temperature of about 15 ℃, frost-free period of 280 days or more, annual rainfall of about 1000mm, mild climate, abundant rainfall for crop growth has created favorable conditions, the same weeds growth is also beneficial . The county farming system to two crops a year that is rice, rice and wheat, rice fertilizer (green manure) based. Rice planting area of more than 60 acres, is one of the major northern Guizhou rice area. The weeds are often accompanied by a certain crop and the formation of a certain group,