ISSN:
1573-5036
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Summary The data presented throughout this paper indicate that soluble Si in plant tissues can give useful information about the Si-status of plants. In fact, this fraction of plant Si seems to be less subject to extraneous variation than does total Si. Silicon which can be extracted with dilute TCA is a discrete fraction. The amount extracted was little influenced by extraction time, amount of extractant, or number of extractions. The soluble-Si fraction was not stable before extraction. Concentration decreased with time. The rate of decrease was temperature related. Storage in a nitrogen atmosphere decreased Siimmobilization. Total and soluble Si were higher in sugar cane leaf sheaths than leaf blades. Total Si was much higher in leaf sheaths and blades than in the internodal tissue. Soluble Si was highest in the least mature tissues; whereas total Si was highest in the recently mature tissue. Once a cane leaf is mature, there seems to be little change in total Si with time. Evidently Si-deposition in sugar cane is associated with growth. Total Si of leaf blades was more responsive to slag applications than was total Si of leaf sheaths. The reverse was true for soluble Si. The mature stalk tended to be the most responsive tissue in relative terms. Both soluble and total Si reflect differences in soil and irrigation water Si. Total Si in the plant was apparently depressed by stress associated with ripening. When silica deposition was depressed, soluble silicon accumulated in the tissue if there was adequate available Si in the soil.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01885263
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