期刊
CANADIAN JOURNAL OF PLANT SCIENCE
卷 86, 期 5, 页码 1401-1403出版社
CANADIAN SCIENCE PUBLISHING
DOI: 10.4141/P06-109
关键词
Orthic Podzol soil P; tissue P; fertilizer P; maximum yield; Daucus carota L
Producers seek to manage the application of nutrients in a manner that maximizes economic crop returns; however, emphasis must now include sensitivity to environmental issues such as increasing soil phosphorus. To address this issue in carrot (Daucus carota L.) production, we studied the effect of soil-applied P fertilizers on yield and soil P content in Prince Edward Island. Six field studies over a 3-yr period evaluated the yield response of carrot on sandy to loamy sand Orthic Podzol soils. Treatments consisted of pre-plant broadcast applied P at 0, 33, 66, 99 or 132 kg ha(-1) on sites where residual P levels ranged from 81 to 162 mu g P g(-1). When the total yield response of carrots to increasing P levels was fitted to a quadratic response curve, 110 kg P ha(-)1 was required to achieve maximum yield, but an application of as little as 22 kg P ha(-1) resulted in 95% of maximum marketable yield. This reduced application rate resulted in a saving of 88 kg P ha(-1) and slowed the buildup of soil P levels. Therefore, by applying more conservative amounts of P fertilizer carrot growers can maintain excellent crop yield while reducing the potential for environmental damage caused by the buildup of soil
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据