摘要
对影响马铃薯的几个主要因素及相互作用进行研究,结果表明,当播种密度一定时,种薯大小无一例外地显著影响产量,即种薯越大产量越高,而其他因素包括品种、来源、季节和海拔不同程度地影响生长和产量。播种时,单位面积的种薯出芽数调整为相同时,种薯大小对单位面积产量不产生影响。证明了种薯单位面积产生的主茎数对产量起决定性作用,特别是单株结薯较少的品种和秋冬作。
A study was carried out to investigate these effects and their interactions with effects of the other factors in sub-troplcal double cropping systems. When evaluated at constant spacing, seed tuber weight significantly affected tuber yield in all conditions under study although seed origin,variety ,altitude and season modified these effects in varying degrees. The effects of seed tuber weight could be attributed to more main stems per plant from heavier seed tubers,resulting in more tubers produced per plant and thus per unit area. When number of sprouts was set equal per unit area,effect of weight of seed tubers on final tuber yield per unit area was absent in seed tuber weight range from 22 to 124 g. However,lighter seed tubers tended to increase leaf area per plant thus compensating the lower plant stand ,with larger progeny tubers achieved. If calculated at a per stem basis the numbers of tubers produced and the tuber yields were different for the seed weight treatments these differences were confounded by seed age effects. The number of tubers produced per unit area largely determined plant yield because the varieties used produced few tubers per plant whereas variation was caused by seed weight or seed density.
出处
《西南农业学报》
CSCD
2007年第3期458-461,共4页
Southwest China Journal of Agricultural Sciences
关键词
马铃薯
种薯大小
结薯数
产量
Seed tuber weight
seed origin
plant density
yield
tuber number
