论文部分内容阅读
丽江坝地处滇西北横断山脉玉龙雪山东南麓,海拔2400米,年平均量12.6℃,年雨量953毫米,干湿季分明,无霜期212天。属冬暖无夏,春秋相连的高位坝区。大春以包谷为主,并种植水稻、黄豆、杂粮;小春以小麦为主,并种植蚕豆、豌豆、油菜、大麦等多种作物,形成了小麦——水稻——蚕豆——包谷——小麦的水旱轮作耕种制度。丽江坝历年水稻栽插1.8万亩左右,高产年1982年单产314斤,低产年1977年为160斤,省综试区丽江点,3461户农家常年种植水稻6500~7500亩,平均单产1981年为256.8斤,1982年为356.6斤,水稻产量低而不稳。原因主要是气温低,大春季节≥
Lijiang dam is located in the southeast foot of Yulong Snow Mountain, Hengduan Mountains, northwest Yunnan, with an elevation of 2,400 meters and an average annual volume of 12.6 ℃. The annual rainfall is 953 millimeters with distinct wet and dry seasons and frost-free period of 212 days. Is a winter warm summer, spring and autumn linked to the high dam area. Spring is dominated by Baogu, and rice, soybeans and miscellaneous grains are planted. Xiaochun is dominated by wheat and planted with many crops such as broad bean, pea, rape, barley and the like, forming wheat, rice, broad bean, Drought and drought rotation farming system. Lijiang dam calendar years of planting 18000 acres of rice, high yield in 1982 yield of 314 pounds, low-yield years in 1977 to 160 pounds, provincial comprehensive pilot area of Lijiang, 3461 peasant perennial planting 6500 ~ 7500 acres, the average yield in 1981 256.8 kg, 356.6 kg in 1982, low and unstable rice yield. The main reason is the low temperature, spring season ≥