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EFFECTS OF SOME GROWTH RETARDANTS ON GROWTH, PHYSIOLOGICAL BEHAVIOR, LODGING DEGREE AND YIELD OF RICE PLANTS
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Abstract: Two field experiments were conducted at Research Farm of the Rice Research and Training Center, Sakha, Kafr El-Sheikh during 2003 and 2004 seasons. The study aimed to evaluate the effect of CCC, MLU 208 (a mixture of CCC and DciB), RSWo411 (Triapenthanol) and Uniconazole on physiological and growth behavior of rice plants, as well as lodging degree of Sakha 104 rice cultivar. Results showed that CCC did not exhibit any significant retarding effect on rice plants.
All levels of MLU 208, RSWo411 and Uniconazole markedly decreased the heights of plants in the terms of decreasing its lodging degree. Number of tillers/m2, flag leaf area and dry weight of rice plants were increased by all growth retardants except CCC. Degree of lodging was decreased by the application of proper levels of MLU 208, RSWo411 and Uniconazole RSW performed better regarding lodging and reduced it to 75% of the control. All growth retardants increased the concentration of chl. a and chl. b in rice leaves but carotenoids were decreased. Nitrogen concentration in shoots and grains was increased white K was decreased. GA concentration in shoots was decreased but ABA was increased by the application of MLU 208, RSWo411 and Uniconazole. The high levels of growth substances stimulated the weight of 1000-grain, starch and protein yields. Grain yield was highest with UNIC (2), MLU (2) and RSW(2), respectively.
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| Publication year |
2005
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| Pages |
95-112
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| Availability location |
معهد بحوث المحاصيل الحقلية - 9 شارع الجامعة- الجيزة
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| Availability number |
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| Organization Name |
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| serial title |
المجلة المصرية للمحاصيل
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| ISSN |
0379-3575
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| Author(s) from ARC |
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| Agris Categories |
Agriculture - General aspects
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AGROVOC
TERMS |
Rice.
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| Publication Type |
Journal
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