REN Zi-li,ZHANG Xian,ZHU Pan-pan,et al.Relationship Between Water Requirement Rate and Environmental Factors of Watermelon in Plastic Shed[J].Northern Horticulture,2013,37(09):42-46.
大棚西瓜需水强度与环境因子的关系
- Title:
- Relationship Between Water Requirement Rate and Environmental Factors of Watermelon in Plastic Shed
- 文章编号:
- 1001-0009(2013)09-0042-05
- Keywords:
- plastic shed; watermelon (Citrullus lanatus); water requirement rate; environmental factors
- 分类号:
- S 651.275
- 文献标志码:
- A
- 摘要:
- 在膜下滴灌栽培模式下，以“农科大5”西瓜为试材，研究了大棚西瓜需水强度与环境因子的关系，以期为设施西瓜精准管理和科学灌溉提供参考。结果表明：在整个生育期内全天平均温度、夜晚平均温度、白天平均温度、平均湿度、平均光强、平均蒸发量随时间呈波动变化；需水强度的变化总体呈波动、缓慢上升的趋势，在第20、50、80天出现需水强度高峰，全生育期平均需水强度为4.45 mm/d。西瓜需水强度与各环境因子均具有较高的相关性，需水强度与全天平均气温、平均光强、平均蒸发量呈极显著正相关，相关系数分别达0.935、0.894、0.878；与平均湿度呈极显著负相关，相关系数-0.848。6个环境因子之间相互影响、相互制约，但全天平均气温和平均光强是影响西瓜需水强度的主要因子。
- Abstract:
- Taking ‘Nongkeda 5’ watermelon as material，the relationship between environmental factors and watermelon water requirement rate were studied.The results showed that the change of environmental factors over time in plastic sheds was fluctuant.Daily mean temperature，daytime mean temperature，nighttime mean temperature and daily mean pan evaporation were slowly rising with time，and a negative correlation was shown between daily mean humidity and illumination.Water requirement rate over time was fluctuant，and the peak appeared in the 20th，50th，80th day.The high correlation was found between environmental factors and water requirement rate.A very significant positive correlation between water requirement rate and daily mean temperature，daily mean illumination，daily mean pan evaporation was showed，and the correlation coefficients that respectively were 0.935，0.894 and 0.878.A very significant negative correlation between water requirement rate and daily mean humidity was also be found，and the correlation coefficient was -0.848.Six environmental factors were influenced and restricted each other，but daily mean temperature and daily mean illumination were the key factors that influenced watermelon water requirement rate.
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备注/Memo
第一作者简介：任自力（1986-），男，甘肃平凉人，在读硕士，现主要从事蔬菜生理生态研究工作。E-mail：renzl@nwsuaf.edu.cn.