Effects of application rate of super absorbent polymers on soil moisture and Solanum lycopersicum growth
ZHang Rui, Geng Guijun, Bai Gangshuan
1.College of Forestry, Northwest A&F University,712100, Yangling, Shaanxi;2.Hydro China Xibei Engineering Corporation, 710065, Xi'an;3.Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, 712100, Yangling, Shaanxi;4.Institute of Soil and Water Conservation, Northwest A&F University, 712100, Yangling, Shaanxi: China
Abstract：In order to explore suitable dosage of super absorbent polymer (SAP) in Solanum lycopersicum production in Hetao irrigation district, Inner Mongolia, with no BJ2101-L SAP for control, different dosages of BJ2101-L SAP (30.0 kg/ hm2, 37.5 kg/ hm2, 45.0 kg/ hm2 and 52.5 kg/ hm2 ) were furrowing-applied before S. lycopersicum planting. Soil moisture, photosynthetic rate, growth, yields,and water use efficiency (WUE) of S. lycopersicum were determined during different growth stages. The results showed that different SAP dosage not only enhanced farming - layer soil moisture in revival stage,flowering stage and young fruit stage, but improved photosynthetic rate and transpiration rate in flowering stage and young fruit stage. In addition, the effects increased with the dosage increasing. SAP also promoted the roots, stems and leaves growth and development. Compared with the contrast, the yields increased 3.48%, 7.83%, 11.01% and 10.29%, the biomass increased 24.9%, 56.7%, 94.0%and 82.7%, the water output rate increased - 0.2%, 3.9%, 6.2% and 5.2%, WUE increased 19.1%, 50.4%, 81.5% and 69.2% at dosage of 30.0 kg/ hm2, 37.5 kg/ hm2, 45.0 kg/ hm2 and 52.5 kg/ hm2, respectively. Trials results indicated that the implementation of SAP could enhance S.lycopersicum growth and WUE, as well as the dosage of 45.0 kg/ hm2 had better effects.
2013, Vol. 11 
