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| DOI: | 10.3719/weed.26.14 |
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| Web URL(s): | https://www.jstage.jst.go.jp/article/weed1962/26/1/26_1_14/_pdf
Last checked: 11/04/2013
Requires: PDF Reader |
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| Publication Type:
| Refereed |
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| Author(s): | Terasawa, Teruo;
Asano, Hiroomi;
Hirose, Shohei |
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| Author Affiliation: | Junior College of Agriculture, Nihon University |
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| Title: | The effect of soil moisture on growth and seed productive structure of large crabgrass and common purslane |
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| Article Series: | Ecological studies on environmental adaptation in weeds, part 3 |
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| Source: | Zasso Kenkyu. Vol. 26, No. 1, 1981, p. 14-18. |
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| Publishing Information: | [Tokyo]: Nihon Zasso Bojo Kenkyukai [The Weed Science Society of Japan] |
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| # of Pages: | 5 |
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| Related Web URL: | https://www.jstage.jst.go.jp/article/weed1962/26/1/26_1_14/_article
Last checked: 11/04/2013
Notes: English abstract only |
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| Abstract/Contents: | "Through the whole growing stage, two species of weeds, large crabgrass (Digitaria sanguinalis var. marginata Fernal.) and common purslane (Portuloca oleracea L.), were grown on four soil moisture conditions, i. e., 100, 50, 25 and 12% of maximum water holding capacity of soil used in this experiment, and several characters as to the vegetative growth and the seed productive structure of both weeds were measured to examine the effects of soil moisture from the viewpoint of environmental adaptation of weeds. 1. The results obtained at vegetative and maturing stage indicated a considerable different response to soil moisture between two weeds, namely, the vegetative growth of large crabgrass was much depressed on over-dry condition (12% soil moisture) than over-wet condition (100%), while, the response was reversed in common purslane. 2. At vegetative stage, top dry matter production per plant showed the highest value at 50% of soil moisture contents in large crabgrass and at 25% of soil moisture contents in common purslane. 3. Little difference of seed weights per panicle in large crabgrass and per pyxis in common purslane was observed among four soil moisture conditions within each weed. Therefore, it was suggested that the quantitative differences of seed production per plant in both weeds were due to the changes in number of panicle or pyxis per plant, which changed largely with soil moisture contents. 4. The changes of crude reproductive efficiency (CRE) with the different soil moistures were examined in both weeds. It ranged from 3 to 5% in large crabgrass and 15 to 20% in common purslane, and was shown as the value of 4 to 5 times in common purslane to large crabgrass. 5. From data of phenotypic plasticity obtained on several characters in both weeds, it was recognized that, on such growth increments as plant height, number of leaves and branches, and others, large crabgrass was generally higher than common purslane, while, on seed production components, the reverse was true. 6. It was suggested that reproductive potential in both weeds was mainly enhanced by increasing number of seeds with the increase of number of panicles or pyxides under optimum soil moisture conditions, even under adverse conditions, however, it was also maintained by some developed panicles or pyxides in which fertile seeds were set." |
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| Language: | Japanese |
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| References: | 11 |
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| See Also: | See also [part 1] "The effect of density on growth and seed productive structure of large crabgrass and common purslane" Zasso Kenkyu, 25(1) 1980, p.10-16, R=232060. R=232060
See also [part 2] "The effect of nitrogen level on growth and seed productive structure of large crabgrass and common purslane" Zasso Kenkyu, 25(2) 1980, p. 88-92, R=232062. R=232062
See also [part 4] "The effect of shading on growth and seed productive structure of large crabgrass and common purslane" Zasso Kenkyu, 26(1) 1981, p. 19-23, R=232069. R=232069
See also [part 5] "Effect of past record of fertilizer application on growth response of large crabgrass (Digitaria adscendens Henr.) and common purslane (Portulaca oleracea L.)" Zasso Kenkyu, 36(2) 1991, p. 142-147, R=232107. R=232107
See also [part 6] "Effect of past record of plant density on growth response of large crabgrass (Digitaria adscendens Henr.) and common purslane (Portulaca oleracea L.)" Zasso Kenkyu, 36(2) 1991, p. 148-152, R=232109. R=232109 |
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| Note: | English summary appears as abstract
Tables
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Terasawa, T., H. Asano, and S. Hirose. 1981. The effect of soil moisture on growth and seed productive structure of large crabgrass and common purslane. (In Japanese) Zasso Kenkyu. 26(1):p. 14-18. |
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| DOI: 10.3719/weed.26.14 |
| Web URL(s):
https://www.jstage.jst.go.jp/article/weed1962/26/1/26_1_14/_pdf
Last checked: 11/04/2013
Requires: PDF Reader |
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MSU catalog number: b9910272 |
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