摘要
运用ASI法测定的潮土区小麦土壤有效磷含量分别与不施磷小麦相对产量呈显著正相关关系。根据小麦相对产量<50%,50%～65%,65%～75%,75%～95%和>95%对应的土壤有效磷指标,可以得出潮土区土壤有效磷"极低"指标为<7 mg/L,"低"指标为7～12 mg/L,"中"指标为12～18 mg/L,"较高"指标为18～38mg/L,"高"指标为>38 mg/L。据此建立的麦田土壤养分丰缺指标推荐施磷量:土壤有效磷含量小于7 mg/L,推荐磷肥用量为135 kg/hm2;土壤有效磷含量在7～12 mg/L之间时,磷肥用量推荐为105 kg/hm2;土壤有效磷含量在12～18 mg/L之间时,磷肥用量推荐为90 kg/hm2;土壤有效磷含量在18～38 mg/L之间时,磷肥用量推荐为60 kg/hm2;土壤有效磷含量大于38 mg/L,建议不施或者少施磷肥。
The content of available P in soil had significantly positive relationship with the relative yield of wheat when no P was applied. Wheat relative yield 〈50% , 50% to 65% , 65% to 75%, 75% to 95% and 〉95% of the corresponding soil available phosphorus indicators could be drawn. The very low, low, medium, high and very high index for soil availa- ble P were 〈7 mg/L, 7 ~ 12 mg/L, 12 - 18 mg/L, 18 -38 mg/L, 〉38 mg/L, respectively. This experiment suggested that the recommended fertilizer quantity were 135 kg/hm2, 105 kg/hm2, 90 kg/hm2, 60 kg/hm2. When soil available P was 〉38 mg/L, the fertilizer quantity could be reduced or not applied.
出处
《中国土壤与肥料》
CAS
CSCD
北大核心
2013年第2期72-74,共3页
Soil and Fertilizer Sciences in China
基金
"十二五"国家科技支撑计划项目(2011BAD16B07
2012 BAD04 B07-3
2013 BAD07 B07)
农业部行业专项(201303103)
河南省院科技合作专项(122106000035)
国际植物营养研究所(IPNI)资助
关键词
小麦
ASI方法
土壤有效磷
潮土
丰缺指标
wheat
ASI
soil available phosphorus
fluvo-aquic soil
abundance and deficiency indices
