Utilisation by white clover and ryegrass of sulphur from35s‐Labelled Gypsum
作者:
R.W. Sheard,
R.H. Jackman,
G.W. Butler,
期刊:
Communications in Soil Science and Plant Analysis
(Taylor Available online 1978)
卷期:
Volume 9,
issue 10
页码: 935-954
ISSN:0010-3624
年代: 1978
DOI:10.1080/00103627809366867
出版商: Taylor & Francis Group
关键词: Total S;Fertilizer S;N/S Ratio;Total N;Percent Recovery
数据来源: Taylor
摘要:
This investigation reports the uptake of S from a surface application of35S‐labelled gypsum by a ryegrass‐white clover mixture sward and by a pure ryegrass stand, each growing at three levels of N in the field. Nitrogen stimulated ryegrass growth, reducing the contribution of white clover to the total yield, whereas S did not influence the yield of either species. Gypsum, while not increasing the total S in the white clover, contributed 23 to 50% of the total S concentration. In contrast, gypsum increased the total S in the ryegrass. The level of N nutrition did not alter the fertiliser S in white clover, but depressed the total S in the ryegrass. Nitrogen enhanced the fertiliser S in ryegrass at the first harvest, however, at the second harvest N depressed the fertiliser S.
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