Effect of N and P fertilization on yield and quality of Kochia grown in the greenhouse
作者:
D. G. Lugg,
P. A. Cuesta,
G. Y. Norcross,
期刊:
Communications in Soil Science and Plant Analysis
(Taylor Available online 1983)
卷期:
Volume 14,
issue 9
页码: 859-875
ISSN:0010-3624
年代: 1983
DOI:10.1080/00103628309367414
出版商: Taylor & Francis Group
关键词: Kachia scoparia(L.) Schrad.;dry matter yield;root dry matter yield;calcium percentage;phosphorus percentage;crude protein percentage;oxalate percentage
数据来源: Taylor
摘要:
The use of kochia (Kochia scoparia(L.) Schrad.) as a forage crop has recently generated considerable interest, but little is known about how fertilization affects yield and quality. Two greenhouse experiments were conducted; the first with a clay loam soil and 0, 67 and 135 kg P/ha, and the second with a sandy loam soil and extremely high rates of P, which were 0, 4.5, 9.0, 13.5 and 17.9 ton P/ha. Both had 0, 84, 168 and 252 kg N/ha in a complete factorial with the P levels. In the first experiment, dry matter yield, root dry matter yield and flowering percentage increased linearly with N, while Ca, P and oxalate percentage decreased quadratically with N. Oxalate levels were low with a mean of 1.98%. Phosphorus levels affected only P percentage, which increased quadratically with P level. No interactions were observed between N and P in the first experiment.
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