杉木种子免耕、翻耕育苗对比试验效果分析

An Analysis of Results from Raising Seedlings of Chinese Fir on Plowed and Unplowed Field

进行杉木种子免耕育苗与翻耕育苗对比试验结果表明,采用免耕法育苗每亩可节约用工(约3～4工),提高土地利用率4%;苗木出土快、整齐;在沙壤质、中壤质土壤上,对地上部分生长无影响,地下部分根长要比翻耕法短,但须根数量多,对苗木总体素质无显著影响;粘重土壤中采用免耕法育苗,其地下部分重量较翻耕法轻,今后推广应用时宜慎重。

The results from the control experiments made on testing the growth of seed-lings in plowed and unplowed field show that to raise seedlings on uuplowed field is a way toeconomize labour force (about 3-4 labour days per mu) and increase the land utility (about4%). It is easier to dig up from the unplowed field the seedlings which laid neat and tidy.On the sandy loam or medium loam, the growth of the seedlings above ground has no affect-ion from unplowed field, but the roots in the ground are shorter than those in plowed field.Because the amount of the fibrous root in unplowed field is abundant, there is no remarkableaffection on seedling growth on the whole. On heavy clay, the weight of the undergroundportion of seedling is lighter than that growing in plowed field. This should be kept in mindwhen the unplowed field method is to be extended.