摘要
在满足氮、磷营养元素需求的前提下,脱毒马铃薯产量随着有机肥和化肥补钾量的增加而增加,但增加到一定程度后产量又下降。有机肥提供的钾和化肥提供的钾交互效应呈负效应,增施有机肥可减少化肥钾施用量。在中低海拔的芋苞间套作模式中有机肥与化肥提供的K2O比例为4.35∶5.65,当施K2O 225.3 kg/hm2可达到最高产量,当施K2O 203.2 kg/hm2可达到经济产量;在高海拔的净作模式中当施K2O 467.2 kg/hm2,有机肥与化肥提供的K2O比例为2.40∶7.60可达最高产量,当施K2O 427.8 kg/hm2,有机肥与化肥提供的K2O比例为2.50∶7.50可达经济产量。
In the premise of satisfy the need for nitrogen, phosphorus nourishment chemical element, the yield of virusfree potato was increased with the increasment of nourishment provided by organic fertilizer and chemical fertilizer. After it increased to certain extent, the yield descends again. The inter-effect of the potassium from organic fertilizer and the potassium from chemical fertilizer presents the negative effect, increasing organic fertilizer can reduce to the potassium dosage of chemical fertilizer. In the set cultivation mode of potato-corn in the low elevation, the comparison of K2O was 4.35：5.65, provided by organic fertilizer with chemical fertilizer, K2O was 225.3 kg/hm^2 and could attain the tallest yield, when K2O203.2 kg/hm^2 could attain the economic yield; In the cleanly culture mode of potato in high elevation, K2O was 467.2 kg/ hm^2 ; in the comparison of organic fertilizer with chemical fertilizer was 2.40： 7.60 could reach the tallest yield, in the comparison of organic fertilizer with chemical fertilizer was 2.50：7.50 could reach the economic yield.
出处
《土壤肥料》
CSCD
北大核心
2006年第1期24-27,43,共5页
Soils and Fertilizers
关键词
脱毒马铃薯
有机肥提供的钾
化肥提供的钾
virus-free potato
the potassium from organic fertilizer
the potassium from chemical fertilizer
