论文部分内容阅读
烤烟品种 G—140于1976年从美国引入我省诸城县试种。1979—1984年,我省先后进行了品种区域试验和生产示范。此后,种植面积迅速扩大。该品种适应性较强,产质兼备,经济效益较好,近两年来种植面积已占全省烤烟面积49%左右,成为我省的主要栽培品种。随着我省烤烟规范化生产的不断深入,G—140的亩栽株数,由原来的1500—1800株降到1300—1500株,单株留叶数由23—25片降到18—22片。亩施纯氮量,以中等肥力水平(土壤有效氮含量40—60ppm)为例,由2.5公斤左右,提高到3.5—4.5公斤。再加上其他有效措
Flue-cured tobacco varieties G-140 in 1976 from the United States into Zhucheng County trial planting. 1979-1984, our province has conducted a variety of regional trials and production demonstration. Since then, acreage has expanded rapidly. The variety adaptability, both quality and production, good economic returns, the past two years, the acreage has accounted for about 49% of the province’s tobacco area, becoming the main cultivated varieties in our province. With the deepening of the standardized production of flue-cured tobacco in our province, the number of planted acres of G-140 dropped from 1500-1800 plants to 1300-1500 plants. The number of leave leaves per plant dropped from 23-25 pieces to 18-22 pieces. Mushi nitrogen content, with medium fertility level (soil available nitrogen content of 40-60ppm), for example, from 2.5 kg, increased to 3.5-4.5 kg. Plus other effective measures