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Two cultivars of Okra ( Abelmoschus esculentus [L.] Moench) were used to compare the relationship between linear dimensions of leaf and leaf area. Formula A = eL2 (where A = leaf area, e = enlargement quotient and L = midrib length of leaf) determined leaf area more accurately. 相似文献
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[目的]探讨黄秋葵(Abelmoschus esculentus)种子中咖啡碱的提取方法,为其进一步开发利用奠定基础。[方法]采用微波提取法、回流提取法和超声提取法3种方法提取黄秋葵种子中的咖啡碱,并采用可见-紫外分光光度法测定其含量。[结果]采用微波提取法时,在中等功率、微波时间8 min条件下,所得的咖啡碱的得率最高,为0.149%。采用回流提取法时,在提取剂水∶乙醇为1∶2、提取时间为1 h条件下,所得的咖啡碱的得率最高,为0.156%。采用超声提取法时,在提取剂用量为25 ml、超声时间为30 min条件下,所得的咖啡碱的得率最高,为0.142%。[结论]该研究得出了采用微波提取法、回流提取法和超声提取法提取黄秋葵种子中咖啡碱含量的最方便最有效的提取方法,可为黄秋葵种子中有效成分提取方面的研究奠定基础。 相似文献
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Yih-Chi Tan Jihn-Sung Lai K. R. Adhikari S. M. Shakya A. K. Shukla K. R. Sharma 《Irrigation and Drainage Systems》2009,23(1):25-41
An on-farm irrigation trial conducted on the upland of Chitwan valley of Nepal evaluated the amount and frequency of irrigation
as well as the effect of nitrogen fertilizer and straw mulch applications on the performance of bottle gourd and okra vegetables.
The experiment was laid out on split-split-plot design with fertilizer as main-plot factor, frequencies of irrigation as sub-plot
factor, and amount of irrigation as sub-sub-plot factor. Data analysis revealed that frequency and amount of irrigation had
a significant interaction effect on the number of nodes that emerge before the opening of the first flower in bottle gourd.
Likewise, a significant effect of mulching was observed on the number of primary branches (P = 0.05). Number of nodes and primary branches both contributed to higher production of bottle gourd. Results also indicated
that frequent application of higher amount of irrigation to bottle gourd could lead to reduced water productivity and suffer
from yield losses. In the case of okra, low level of nitrogen application (30 kg N ha−1) with low but daily watering had significantly higher yield (1,365 g plot−1) than from higher level of nitrogen application (90 kg ha−1) (P = 0.01). Interaction effect of all factors was also significant (P = 0.05) on the fruit yield of okra which implied greater value of smaller irrigation to contribute to increased returns to
farmers by improving production level of okra in this area of Nepal 相似文献
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