Effects of phosphorus on seed yields of subterranean clover, serradella and annual medics
- 1 January 1985
- journal article
- research article
- Published by CSIRO Publishing in Australian Journal of Experimental Agriculture
- Vol. 25 (3), 595-602
- https://doi.org/10.1071/ea9850595
Abstract
In three experiments located near Esperance, Western Australia, the effect of superphosphate phosphorus on seed yields of subterranean clover, serradella and annual medics was measured on newly-cleared soils, using low seeding rates. In two experiments, the relationship between seed yield and the amount of phosphorus applied was linear for subterranean clover and serradella; seed yields increasing by 7-24 kg/ha for each kg/ha of phosphorus applied, depending on species, strain or cultivar, and location. In the third experiment, seed yields of annual medic species also increased markedly with increasing amounts of applied superphosphate phosphorus, this response also depended on species and strain or cultivar, but the responses become less marked with increasing amounts of phosphorus. For the annual medic species, the phosphorus treatments had no effect on average weight of one burr, number of seeds per burr, weight of one seed, or the rate of softening of hard seeds as measured both in a 15/60¦ alternating temperature oven (one cycle/day) or for samples of burrs collected periodically during summer from the field. For all legumes, the appearance of first flowers was not affected by phosphorus treatment.Keywords
This publication has 4 references indexed in Scilit:
- Phosphorus Deficiency and Flowering in Subterranean Clover (T. subterraneum L.)Annals of Botany, 1978
- Phosphate sorption by soils as a measure of the phosphate requirement for pasture growthAustralian Journal of Agricultural Research, 1967
- Root distribution in a deep sand and its relationship to the uptake of added potassium by pasture plantsAustralian Journal of Agricultural Research, 1965
- The effect of constant and fluctuating temperatures on the permeability of the hard seeds of some legume speciesAustralian Journal of Agricultural Research, 1961