Sensibility of cotton crops to mepiquat chloride under saline conditions
Sensibility of cotton crops to mepiquat chloride under saline conditions
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DOI：
10.1590/s1806-66902012000300010
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发表时间：
2012-03
影响因子：
0.8
通讯作者：
F. A. Oliveira;J. F. Medeiros;F. A. Oliveira;M. K. T. D. Oliveira;A. G. Freire
中科院分区：
文献类型：
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作者：
F. A. Oliveira;J. F. Medeiros;F. A. Oliveira;M. K. T. D. Oliveira;A. G. Freire
本试验旨在评价不同盐度灌溉水和植物生长调节剂处理对棉花植株发育的影响。试验设计完全随机化，采用5 × 2阶乘方案，重复4次。不同浓度灌溉水（S1-0.5、S2-2.0、S3-3.5、S4-5.0和6.5 dS - m-1）对种子的处理效果不同。评价指标为：叶片数、叶面积、高度、茎干质量、叶和营养部位、比叶面积和叶面积比。盐碱度与种子处理间存在交互作用，但仅影响叶面积和叶面积比。其他性状均随灌溉水盐度的增加而降低，其中叶面积和营养部位干质量的降低幅度较大，分别为65.8%和64%。氯化物对种子的处理影响植株的发育，与盐度无关。
This work was carried out to evaluate the effect of irrigation water at different salinity levels, and of seed treatment with plant growth regulator, on the development of the cotton plant. The experimental design used was completely randomized, arranged in a 5 x 2 factorial scheme with four replications. The treatments resulted from the combinations of five levels of salinity of the irrigation water (S1-0.5, S2-2.0, S3-3.5, S4-5.0 and 6.5 dS m-1) on seeds, both treated and not treated with growth regulator. The evaluated characteristics were: number of leaves, leaf area, height, dry mass of stems, leaves and vegetative parts, specific leaf area and leaf area ratio. There was an interaction between salinity and seed treatments with mepiquat chloride, but only for leaf area and leaf area ratio. All other characteristics decreased with the increasing salinity of the irrigation water, with greater reductions in leaf area (mean of 65.8%) and dry mass of vegetative parts (64%). Seed treatment with mepiquat chloride affected plant development, independent of salinity.