COMPETITION BETWEEN BARLEY AND WILD OATS AS AFFECTED BY NITROGEN, BARBAN AND TIME OF SEEDING

Autor:	H. A. Friesen, D. A. Dew, D. K. McBEATH
Rok vydání:	1970
Předmět:	media_common.quotation_subject food and beverages chemistry.chemical_element Sowing Plant Science Horticulture Biology Pesticide biology.organism_classification Nitrogen Competition (biology) Nutrient chemistry Agronomy Yield (chemistry) Seeding Avena fatua Agronomy and Crop Science media_common
Zdroj:	Canadian Journal of Plant Science. 50:541-550
ISSN:	1918-1833 0008-4220
DOI:	10.4141/cjps70-102
Popis:	Main effects and interactions of nitrogen, barban (4-chloro-2-butynyl m-chlorocarbanilate) and time of seeding of wild oats (Avena fatua L.) in relation to barley were investigated in factorial growth chamber and field experiments. Culms and yield of barley were increased by nitrogen and barban in both experiments, and increased by each delay in wild oat seeding in the growth chamber only. Culms and yield of wild oats were increased by nitrogen in the growth chamber but not in the field, and were decreased by barban and delayed seeding in both experiments. Competition between the two species growing together is demonstrated by reciprocal relationships between culm numbers and yield of the two species. Similar results were obtained for most main effects and interactions in the two experiments, indicating that competitive and nutrient stresses developed in short term growth chamber studies can be used for the prediction of results under field conditions.
Databáze:	OpenAIRE
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