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Influence of sprinkler irrigation droplet diameter, application intensity and specific power on flower damage

Yisheng ZHANG, Delan ZHU

Frontiers of Agricultural Science and Engineering 2017, Volume 4, Issue 2, Pages 165-171 doi: 10.15302/J-FASE-2017145

Abstract: To determine the main parameters of droplet strike damage and avoid flower injury due to the unsuitable practices during sprinkler irrigation, an indoor experiment of irrigation droplet impact on cyclamen was conducted. The influences of different parameters such as droplet diameter, application intensity, specific power on flower strike damage was analyzed using Image Pro-Plus software to compute strike damage area and define damage level by sense-analysis. The results showed that a damage area of <1% represents a safe irrigation level, 1%–3% slight damage level, 3%–6% moderate damage level, and>6% heavy damage level. Equations of application intensity, specific power with sprinkler irrigation time and flower injury ratio were regressed against parameters which cause impact damages. The results indicated that specific power has a significant correlation with injury, and flower damage area increased as the increasing of the value of specific power for the same irrigation time. Application intensity was also correlated with injury when the droplet diameter was larger than 1 mm. When the duration of sprinkler irrigation was 1, 5 and 10 min, the threshold of impinging damage of application intensity was 25.30, 5.01 and 1.64 mm·h and the specific power was 0.467×10 , 9.340×10 and 3.110×10 W·m . These results provide a reference for determining the suitable values of sprinkler properties in operation design.

Keywords： application intensity damage floriculture flowers specific power sprinkler irrigation

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Facing Challenges and Searching Chances at the Same Time——The Present Status of Chinese Flower Enterprise

Chen Junyu

Strategic Study of CAE 2002, Volume 4, Issue 10, Pages 17-20

Abstract: International Horticultural Exposition as an example, the author is convinced that Chinese gardens and flowerschances——the so-called “Hua-Hui Xin Si Hua”，viz,①traditional Chinese famous flowersinternationalized;②world famous flowers becoming“sinicized” and localized;③ wild flowersThen，China will be turned from the “Mother of Gardens” to the “Kingdom of World Flowers

Keywords： challenges searching chances counter-measure flowers ornamentals flower industry prospects