| Study on high-yielding indicators of greenhouse mini-watermelon under deficit irrigation |
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| DOI：10.7606/j.issn.1000-7601.2010.02.26 |
| Key Words: deficit irrigation mini-watermelon yield path coefficient root-shoot ratio |
| Author Name | Affiliation | | LI Jinping | The Key Laboratory of Agricultural Soil and Water Engineering in Arid Area of Ministry of Education, Northwest A & F University, Yangling, Shaanxi 712100, China | | CAI Huanjie | The Key Laboratory of Agricultural Soil and Water Engineering in Arid Area of Ministry of Education, Northwest A & F University, Yangling, Shaanxi 712100, China | | ZHENG Jian | The Key Laboratory of Agricultural Soil and Water Engineering in Arid Area of Ministry of Education, Northwest A & F University, Yangling, Shaanxi 712100, China | | WANG Jian | The Key Laboratory of Agricultural Soil and Water Engineering in Arid Area of Ministry of Education, Northwest A & F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| Taking mini-watermelon as the test material，four irrigation levels were set at different growth stages in greenhouse. With irrigation water amount controlled by E-601 type evaporator, the effects of deficit irrigation on greenhouse mini-watermelon yield were studied. Taking the stem height, stem diameter, above-ground dry weight and root dry weight as the monomial indicators, calculation was made of the direct and indirect path coefficient among these indicators and yield through path analysis method. The results indicated that appropriate deficit ir
rigation could improve yield and water use efficiency obviously. The relationship among stem diameter, above-ground dry weight, root dry weight and yield was obviously significant, and stem diameter and root dry weight could be considered as the monomial indicators for evaluating the high mini-watermelon yield, but above-ground dry weight had an indirect influence on mini-watermelon yield through interaction with other indicators. Through the analysis to root-shoot ratio which was a relative high yield indicator, it showed that the mini-watermelo
n would get high yield when the root-shoot ratio maintained in a certain range. The results supplied guidance to cultivate mini-watermelon with high yield form indicators. |
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