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| Effects of Different Nutrient Solutions on Growth and Yield of Cherry Tomato under Negative Pressure Water Irrigation Device in Green House |
| MAO Si-shuai1，2，HU Yue-gao2，XUE Xu-zhang1*，WU Xin-yan1，ZHANG Fang1，3，CHEN Fei1 |
| 1National Research Center for Intelligent Agricultural Equipments，Beijing 100097，China|2College of Agronomy and Biotechnology，China Agricultural University，Beijing 100193，China|3Northwest Key Laboratory of Water Resources and Environment Ecology，Ministry of Education，Xi’an University of Technology，Xi’an 710048，Shaanxi，China |
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Abstract A negative pressure water irrigation device was used to supply nutrient solution directly for cherry tomato（Lycopersicon esculentum var. cerasiforme）．Setting water supply tension to control stable soil moisture regime，different nutrient solutions formulae with different potassium dihydrogen phosphate（KH2PO4）concentrations were designed to make cherry tomato substrate cultivation．Effects of nutrient solutions with different potassium dihydrogen phosphate concentrations on plant height，stem diameter，yield，water and fertilizer use efficiency and root activity of cherry tomato were investigated．The results indicated that under the condition of negative water supplying and controlling device，as the concentration of potassium dihydrogen phosphate in nutrient solution increased，the plant height，stem diameter of cherry tomato increased，the effects were significant．The fruit yield，water use efficiency，N and K utilization efficiency and root activity were increased at the same time．For cherry tomato production under solutions from negative pressure water irrigation device，340 mg•L-1 KH2PO4 concentration can be considered as suggested application rate in solutions.
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Received: 26 March 2012
Published: 15 July 2012
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