THE INFLUENCE OF CALCIUM AND MAGNESIUM SUPPLY ON NECTAR PRODUCTION IN RED CLOVER AND SNAPDRAGON

Author:

Shuel R. W.

Abstract

The effect on nectar production of factorial combinations of three levels each of calcium and magnesium, comprising a ninefold variation in concentration, was studied in red clover and snapdragon. Plants were grown in sand and the essential elements supplied by daily sub-irrigation. Nectar secretion in red clover was comparatively sensitive to the availability of calcium and magnesium, the best factorial combination (intermediate calcium and high magnesium) producing almost twice as much nectar per unit of inflorescence weight as the poorest (low calcium and low magnesium). Nectar production was not correlated with vegetative growth or flower production. Inter-treatment variation was less extreme in snapdragon. In one crop the combination of high calcium and high magnesium, which supported the best growth and flower production, also gave the best nectar yield; in another crop the lowest level of calcium, sub-optimal for growth, produced the most nectar. The effects of nutrition on secretion were not related to the influence of pH, which was constant, or to the content of calcium, magnesium, nitrogen, phosphorus, or potassium in the red clover or snapdragon shoots.

Publisher

Canadian Science Publishing

Subject

Horticulture,Plant Science,Agronomy and Crop Science

Cited by 6 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Observations on Nectar Secretion in Fireweed,Epilobium AngustifoliumL. (Onagraceae);Journal of Apicultural Research;1990-01

2. Nectar Accumulation in Flowers of Fireweed,Epilobium Angustifolium(Onagraceae), in Response to Simulated Defoliation;Journal of Apicultural Research;1989-01

3. Physiologie und Morphologie sekretorischer Pflanzenzellen;Sekretion und Exkretion Funktionelle und morphologische Organisation der Zelle;1965

4. Zur Cytologie und Physiologie pflanzlicher Dr�sen;Protoplasma;1964-06

5. The effect of fertilizers on the yield of red clover seed;The Journal of Agricultural Science;1962-08

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