摘要
淡灰钙土是宁夏重点开发利用的耕地资源。针对新垦淡灰钙土土壤速效P含量贫乏的问题,采取田间定位试验的方法,研究了新垦淡灰钙土4年的玉米施磷效应,结果表明:新垦淡灰钙土施用磷肥不但当季玉米增产效果显著,而且连续3年磷肥残效也十分显著,随着施磷量的增加,后效也增大。同时,增施磷肥可迅速提高土壤速效P含量,P2O5施用量为138.0、207.0、279.0、414.0kghm-2,当季土壤速效P含量较不施磷肥增加1.8mgkg-1～10.4mgkg-1,提高90%～520%。但在第2年～第4年不施磷肥的情况下,土壤速效P含量明显下降。
According to available P scarcity on the recent reclaimed light sireozem, the field location experiment was designed to study phosphorous fertilizer effectiveness for corn in 4 years. The results showed that phosphorous fertilizer application improved corn yield significantly in the first year, and also the continuous 3 years. With the increase of the phosphorous fertilizer application, the residual effectiveness increased. Meanwhile, phosphorous fertilizer application improved soil available P rapidly compared with non-phosphate application. The application amount of 138.0 kg hm^-2, 207.0kg hm^-2, 279.0kg hm^-2, 414.0kg hm^-2 in the first year increased soil available P from 1.8mg kg^-1 to 10.4mg kg^-1, about from 90% to 520%. But if without phosphorous fertilizer applying from the second year to the forth, soil available P decreased.
出处
《土壤通报》
CAS
CSCD
北大核心
2009年第2期335-337,共3页
Chinese Journal of Soil Science
基金
宁夏科技厅"十五"重点科技攻关项目资助
"宁夏扶贫扬黄红寺堡灌区高效农业技术体系研究与示范"研究报告的部分内容
关键词
新垦淡灰钙土
磷肥效应
Recent reclaimed light sierozem
Effectivness of phosphorous fertilizer
