| Characteristics of resistance to drought naturally colored cotton’s |
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| DOI：10.7606/j.issn.1000-7601.2010.04.21 |
| Key Words: naturally colored cotton amount of irrigation characters of resistance to drought |
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| Abstract: |
| Naturally colored cotton usually has characters of quick growing and strong resistance to drought. Under the condition of middle fertile soil and different imigation times, the research is designed to investigate the characteristics
of two naturally colored cotton varieties to resist to drought compared with a white variety . The result shows that irrigation affects the fiber color of the colored cotton only and lower irrigation times could change the fiber color to light. Irrigation affects the fiber strength and Mac. less , but affects the fiber length more of the two kinds of cotton. Comparing treatment B2 with B5, fiber length of varieties A1 ,A2, A3 decreased 0.8 mm,1.1 mm and 0.9 mm than B5 respectively . Amount and times of irrigation affect apparently to the plant growing days, boll lose and yield of two kinds of cotton but affect the colored cotton varieties less than the white one. Using a method of reducing irrigation times will lead up to boll lost more and yield decrease more of every varieties in trial . But two naturally colored cotton varieties lose less bolls of 4.1 percent to 7.0 percent, yield decrease lower 1 .0 percent to 10 .9 percent and growing days shorten 3 d to4 d than white one. Therefore the research has proved that two naturally colored cotton varieties have characteristics of higher resistance to drought compared with the white cotton variety. |
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