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首页> 外文期刊>Acta Horticulturae >Comparative evaluation of Pima and Upland cotton transpiration in the San Joaquin Valley.
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Comparative evaluation of Pima and Upland cotton transpiration in the San Joaquin Valley.

机译：圣华金河谷皮马和陆地棉蒸腾作用的比较评价。

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摘要

San Joaquin Valley (California, USA) produces 85-90% of the US Pima cotton (Gossypium barbadense) crop. Although it typically produces lower yields than the Upland G. hirsutum cultivar, the Pima cultivar has extra-long staple cotton, which is prized for its high quality, and the cultivar is adapted for most cotton producing regions of the world. The active vegetative growth period of commonly grown Pima cultivars exceeds that of Upland by 10 to 21 days, while a similar extension of the fruit maturity period has been observed. The extended vegetative growth period was studied to observe any influence on seasonal crop water use patterns. A 3-year experiment (2000-02) was conducted in California to establish plant canopy measurements and to monitor actual evapotranspiration (ETa) throughout the growing season in grower fields. While similar water management approaches were employed between fields each year of the study, year-to-year differences in grower water management practices appear to have influenced annual differences in ETa. Increases in ETa were observed for Pima cotton both early and again late in the season. However, midseason water use rates did not differ. The frequency and volume of irrigation water applied was at least as important to seasonal crop water use as climate variation.
机译：圣华金河谷（美国加利福尼亚）的产量占美国比马棉（陆地棉）产量的85-90％。虽然比马陆地棉的产量通常比陆地棉低，但皮马棉的特长棉因其高品质而备受推崇，该棉适用于世界上大多数产棉地区。常见的Pima品种的营养生长活跃期比Upland的活跃营养成长期延长了10到21天，而果实成熟期也有类似的延长。研究了延长的营养生长期，以观察对季节性作物用水模式的任何影响。在加利福尼亚州进行了为期3年的实验（2000-02），以建立植物冠层测量值，并在整个种植田的整个生长季节监测实际蒸散量（ETa）。尽管在研究的每一年之间在田间之间都采用了类似的水管理方法，但种植者水管理实践的逐年差异似乎已经影响了ETa的年度差异。皮马棉在季节的早期和后期都观察到ETa的增加。但是，季中用水率没有差异。灌溉用水的频率和数量对季节性作物用水至少与气候变化同样重要。

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