The responses of tall fescue and white clover to lime and phosphorus on highly leached soils of the Natal Mistbelt
The responses of tall fescue and white clover to lime and phosphorus on highly leached soils of the Natal Mistbelt
复制标题
纳塔尔雾带高度淋滤土壤上高羊茅和白三叶草对石灰和磷的响应
DOI：
10.1080/00725560.1982.9648954
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发表时间：
1982
期刊：
影响因子：
--
通讯作者：
C. A. Kirton
中科院分区：
文献类型：
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作者：
N. Miles;P. E. Bartholomew;C. Macdonald;C. A. Kirton
采用析因设计，研究了石灰和磷对两种高浸出错带土壤上纯白三叶和白三叶/高羊茅草地生长性能的影响。本文讨论的第一季数据表明，干物质对石灰和磷的反应都非常显著，对磷的反应模式在该季节的三次收获中都不同，三叶草和羊茅都没有表现出单一的最适磷水平。随着石灰量的增加，两种土壤中可提取的(0，05 NH_2SO_4)P水平均有所下降。三叶草对石灰的产量反应与土壤酸饱和度降低到18%以下是一致的。羊茅产量随着施石灰速度的增加而线性增加，达到最高石灰水平(20.4吨/公顷)；这种反应被认为部分归因于石灰对土壤有机质中氮矿化的影响。
Abstract The influence of lime and P on the performances of pure white clover and white clover/tall fescue swards on two highly leached Mistbelt soils was examined in factorial design. First season data, discussed in this paper, indicated highly significant dry matter responses to both lime and P. The pattern of response to P. varied over the three harvests obtained in the season and a single optimum P level was not manifested for either clover or fescue. Decreases in extractable (0,05 NH2SO4) P levels with increasing lime rates were noted on both soils. Clover yield responses to lime were coincident with the reduction of soil acid saturations to below 18 percent. Fescue yield increased linearly with liming rate to the highest lime level applied (20,4 tonnes/ha); this response is thought to be partly attributable to the influence of lime on N mineralisation from soil organic matter.