摘要
以加工型马铃薯泉引1号脱毒原原种为材料,按6个密度进行种植试验(行距均为50cm,株距分别为11、12.5、14.0、16.0、18.5和22.0 cm)。结果表明,在闽南泉州的自然条件下,泉引1号种薯产量和单个块茎平均重量随着种植密度的增大先升高后降低;单位面积块茎数随着种植密度的增大而增加。对植株地上部鲜重和叶面积指数变化的分析结果表明,较高密度群体具有发育快、生长旺的特点。在本试验中,株距为11.0cm(每公顷15.0万株)和12.5cm(每公顷13.5万株)时,虽可获得更多的块茎数,但其叶面积增长过快,相互遮荫,光合效率降低,产量低下,小薯比例增多;株距为14.0cm(每公顷12.0万株)和16.0cm(每公顷10.5万株)时,可获得较高的块茎产量,同时,由于株距为14.0cm处理的块茎数目明显多于后者,因此,它是泉引1号原原种扩繁的适宜种植密度。
The planting density for reproducing miniature of processing potato in Quanzhou City was studied. Six planting densities of Quanyin 1 were designed. Spacing in row was 11. 0, 12.5, 14.0, 16. 0, 18. 5 and 22. 0 cm respectively with the same 50 cm spacing between rows . The results showed that yields and the average weight of single tuber were increased first and then decreased with densities increasing. Number of tubers was increased as density increasing. The analysis of change on plant fresh weight above ground and leaf area index showed that potato planted in higher density always developed quickly and vigorously. The more number of tubers could be gained from the densities, whose space in row was 11.0 cm (150 thousand plants per ha) and 12. 5 cm (135 thousand plants per ha) . But their leaf area index promoted quickly, the dry matter produced slowly,so their yields decreased and the ratio of small tuber increased. Higher yields could be gained from the densities with space in row was 14.0 cm (120 thousand plants per ha) and 16. 0 cm (105 thousand plants per ha) . The densities with space in row was 14. 0 cm had the higher number of tubers.
出处
《福建农业学报》
CAS
2004年第1期24-27,共4页
Fujian Journal of Agricultural Sciences
基金
福建省重大农业科技项目(2001Z006)
