摘要
在满足氮、磷营养元素需求的前提下,有机肥与无机肥所含的钾,对脱毒马铃薯产量均呈报酬递减率关系,交互效应呈负值。在中低海拔的芋苞间套作模式中最佳施肥量为每667m2施总K2O为11 kg,每667m2平均产量可达1 400 kg,其有机肥的K2O与无机肥的K2O施用比例为3∶7;高海拔净作模式中最佳施肥量为每667m2施总K2O 30 kg,平均产量可达3 100 kg,其有机肥的K2O与无机肥的K2O施用比例为1∶3。
There is the reward decrement relationship between K amounts from organic and inorganic fertilizer and yield of virus free potato, and the reciprocal effect presents a negative value. The average yield is about 1 400 kg/667m^2 by applying 11 kg of K2O/667m^2 in the potato maize interplanting model at middle-lower elevation areas and the applied ratio of K2O from organic and inorganic fertilizer is 3 : 7. The average yield is up to 3 100kg/667m^2 by applying 30kg/667m^2 in the single planting model at higher elevation areas and the applied ratio of K2O from organic and inorganic fertilizer is 1 : 3.
出处
《贵州农业科学》
CAS
2005年第5期45-48,共4页
Guizhou Agricultural Sciences
关键词
脱毒马铃薯
有机肥的K2O
无机肥的K2O
virus-free potato
K2 O from organic manure
K2O from inorganic fertilizer