Differences in Response to Available Phosphorus among White Clover Cultivars

Autor: Michael P. Russelle, C. J. P. Gourley, Deborah L. Allan
Rok vydání: 1993
Předmět:
Zdroj: Agronomy Journal. 85:296-301
ISSN: 1435-0645
0002-1962
DOI: 10.2134/agronj1993.00021962008500020025x
Popis: The selection of agriculturally important plant germplasms more tolerant of low P may increase productivity on P deficient soils and reduce P fertilizer requirements. Differences in response to P availability among six cultivars of white clover (Trifolium repens L.) were investigated in a series of pot experiments using a sand-alumina culture technique and two low P soils, an acid Hapludult with 2.6 mg Bray-P kg −1 and a calcareous Calciaquoll with 6.9 mg NaHCO 3 -extractable P kg −1 . Plants were grown in the greenhouse or growth chamber for up to 63 d in solution [P] of 0 to 82 μM. Plant characteristics measured included dry mass and P concentration of shoots, coarse roots, and fine roots; P distribution within the plant; and root traits of total length, root hair length and number per unit root surface area, and root tip number [...]
Databáze: OpenAIRE