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杨树育苗在宿迁市已进行多年,但据多年苗圃积累的资料表明,成活率一般在65％～70％,3m以上大苗成活率仅在50％～60％。按标准苗木价格计算,每亩产值只有500元左右。为了探索提高杨树育苗成活率提高大苗产出率,增加单位面积经济效益,调节苗圃工人冬闲春忙状况,自1990～1991年连续两年对杨树育苗进行了冬插试验。 1 材料和方法 1.1 整地 1990年1月初,对圃地冬翻两遍,并结合耕翻,每亩施人粪尿1000kg,磷肥50kg。然后按宽3.3m、长25m作床。 2 种条处理 插穗按13～15cm长度剪截,每百株1束,清水浸泡12～24小时。为防治地下害虫,浸条时水中兑加辛硫磷3000倍液。 13 扦插方式 采用大小行。大行距70cm,小行距40cm,每床扦插6行,株距27cm,每亩扦插4500株。 1.4 田间管理 春天在土壤解冻后,对插穗进行踩实1次,以消除冻拔现象。 1991年冬,又重复进行了1次,基本技术措施同于上年。但为了防止冬季插穗冻拔现象,在育苗行上盖上了一层松土。 对照(春插)于3月底4月初进行,其方法同冬插。 2 试验结果 1990年按地块起苗、分级、统计,结果见表1。
Poplar nursery has been in Suqian City for many years, but according to many years of accumulated nursery data shows that the survival rate is generally 65% to 70%, 3m above the survival rate of seedlings only 50% to 60%. According to the standard price of seedlings, the output value of only 500 yuan per mu. In order to explore and improve the survival rate of poplar seedlings to improve the yield of large seedlings, increase the economic benefits per unit area, nursery workers to adjust the winter leisure and busy conditions, from 1990 to 1991 for two consecutive years of poplar nursery winter plug test. 1 Materials and methods 1.1 Site preparation In early January 1990, the winter garden turned over twice, combined with tillage, manure applied per acre 1000kg, 50kg of phosphate fertilizer. Then press width 3.3m, length 25m for bed. 2 kinds of processing cut cut according to the length of 13 ~ 15cm, 1 per 100 strains, soaked in water for 12 to 24 hours. To control underground pests, dip when the water against phoxim 3000 times. 13 cuttings using the size line. Big row spacing 70cm, small row spacing 40cm, 6 rows per bed cuttings, plant spacing 27cm, 4500 per acre cuttings. 1.4 Field Management Spring thawed in the soil, cuttings on stepping 1 times in order to eliminate the phenomenon of freezing and pulling. In the winter of 1991, it was repeated once again with the same basic technical measures as the previous year. However, in order to prevent winter snapped frozen phenomenon, in the nursery line covered with a layer of loose soil. Control (spring inserted) at the end of March early April, the same method with winter inserted. 2 test results in 1990 by plot plots, grading, statistics, the results shown in Table 1.