Farmland Irrigation Research Institute

Henan’an, China

Farmland Irrigation Research Institute

Henan’an, China
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Yan S.,Farmland Irrigation Research Institute | Yan S.,North China University of Water Conservancy and Electric Power | Qing G.,Farmland Irrigation Research Institute
Journal of Chemical and Pharmaceutical Research | Year: 2014

Irrigation with untreated wastewater, especially the wastewater containing several toxic substances, would cause serious farmland pollutions in some irrigation zones and reductions on the quality and yield of agricultural products. Moreover, some heavy metals and toxic substances in wastewater would enter the human food chain through agricultural products, and some excessive nitrogen would pollute the groundwater or flow into the surface water, resulting in excessive nitrites in drinking water. All of those will affect human health severely. Generally, a large amount of salts exist in wastewater, and therefore irrigation with them would bring about damages on soil structure or induction of soil salinization. Consequently, studies on the improvement of pretreatment technologies on wastewater and promotion of irrigations with reclaimed water are of great significance on both the protection of eco-environment and the promotion of economic benefits. Besides, strengthened management and regular monitoring are required for utilizing the reclaimed water resource scientifically and reasonably. © 2014, Journal of Chemical and Pharmaceutical Research. All rights reserved.

Shi Y.,North China University of Water Conservancy and Electric Power | Shi Y.,Farmland Irrigation Research Institute | Sun K.,North China University of Water Conservancy and Electric Power
Journal Wuhan University of Technology, Materials Science Edition | Year: 2016

CdSe quantum dots (QDs) were synthesized using diphenylcarbazide (DL) to sequester QDs precursors (Cd2+) in situ. Fluorescence (FL) analysis showed the successive synthesis of QDs could be realized by capping with DL and the binding between DL and Cd2+. The average QDs particle size was about 5-20 nm by high-resolution transmission electron microscopy (HRTEM). Fourier transform infrared (FT-IR) spectra showed that CdSe QDs could be chemically bonded with DL. The formation of QDs-DL-Cr(VI) could lower the fluorescence intensity of QDs. In a certain concentration range, the fluorescence intensity and Cr(VI) concentration presented a linear relationship. As a result, this phenomenon could be used to determine the Cr(VI) concentration in the range of 0-24 ×10−6 mol· L−1. © 2016, Wuhan University of Technology and Springer-Verlag Berlin Heidelberg.

Zhang Z.-Y.,Hohai University | Wang S.-F.,North China University of Water Conservancy and Electric Power | Duan A.-W.,Farmland Irrigation Research Institute | Wang B.,Hohai University
Shuikexue Jinzhan/Advances in Water Science | Year: 2010

A reference evapotranspiration(ET 0) prediction model is developed based on the least squares support vector machines. Weather forecasts are used for ET 0 predictions. The model can be trained with daily weather parameters including quantified weather types and wind grades, etc. Different combinations of daily weather parameters can be tested in the model training processes. In this study, the daily weather parameters are obtained from the Guangli irrigation district during the period 1997-2007. The 1997-2006 data are used for the model training, and a total of 10 daily ET 0 forecasting schemes are established. Predictions of daily ET 0 using each of the 10 schemes are validated with the observations from 2007. The results show that the scheme using the air temperature and the quantified weather types and wind grades as model predictors is able to give the best model performance; and the corresponding statistics are the root mean square error(E RMS) of 0.5182, the relative error(E R) of 0.1878, the coefficient of determination(R 2) of 0.8648, the I A of 0.9669, and the regression coefficient(R C) of 0.9868. Acceptable daily ET 0 predictions are also obtained with other 6 schemes, among which the simplest scheme using only the air temperature as the model predictor can also produce fair results as revealed by E RMS=0.6576, E 2=0.2332, R 2=0.9866, I A=0.7747 and R C=0.9680. The latter scheme shows a strong potential in practical applications.

Yan S.,Farmland Irrigation Research Institute | Yan S.,North China University of Water Conservancy and Electric Power | Qing G.,Farmland Irrigation Research Institute
BioTechnology: An Indian Journal | Year: 2014

Irrigation with wastewater alleviated the shortage of agricultural water resources at the same time, also caused series of environmental security issues. The groundwater was polluted, farmland was polluted by some heavy metals and toxic substances), the quality and yield of agricultural products reduced in some irrigation zones. All of those will affect human health severely. The effective ways to improve the safety of sewage irrigation is to push forward the pretreatment technology of sewage, to promotion of irrigations with reclaimed water and to combine sewage treatment technology with suitable irrigation ways. Through these measures, the safe use of sewage recycle treatment will be realized, the ecological environment will be improved, and the food security will be ensured. © Trade Science Inc.

Wang K.,Wuhan University | Zhang J.,Farmland Irrigation Research Institute
5th International Conference on Bioinformatics and Biomedical Engineering, iCBBE 2011 | Year: 2011

The objective of this study was to investigate chemical contaminants penetrated into groundwater through macropores in the vazone zone. A total of 4 experiments with various ponding depths were conducted. With a combined method, dye and iodine-starch staining were used to visualize soil macropore and soil water flow patterns, respectively. Flow patterns with a low infiltration amount were similar to the macropore patterns and macropores were the main factor to control the flow patterns. As the infiltration amount increased, flow patterns were influenced by both macropores and boundary conditions. Soil water flow patterns became more heterogeneous as the heterogeneity of macropores increased. Stained patterns played a much important role in redistribution of infiltration water than the soil saturation change in the stained region. The contaminants concentration decreased dramatically in the upper depth and then the decreasing trend was slowed down. © 2011 IEEE.

Zai S.-M.,Farmland Irrigation Research Institute | Wen J.,Farmland Irrigation Research Institute | Wu F.,Farmland Irrigation Research Institute | Sun H.,Farmland Irrigation Research Institute
Shuili Xuebao/Journal of Hydraulic Engineering | Year: 2011

Based on the support vector machine (SVM) theory, a SVM model was established to evaluate the water resources carrying capacity in Xinxiang City, Henan Province. The evaluation index system with 8 factors was suggested according to the impact factors of water resources carrying capacity, and the water resources carrying capacity of the study area was evaluated and predicted. The results show that from 1995 to 2008, the water resources carrying capacity index of Xinxiang was varied from 0.22 to 0.55, which belongs to weak carrying capacity. With the construction of water-saving society and the using of recycled water irrigation, the water resources carrying capacity index of the study area will be significantly improved. The predicted index of this city in 2015 will be 0.6 or higher. This study result is helpful to the management of exploitation and utilization of regional water resources.

Liu H.,Farmland Irrigation Research Institute | Duan A.,Farmland Irrigation Research Institute | Sun J.,Farmland Irrigation Research Institute | Ning H.,Farmland Irrigation Research Institute | Wang F.,Farmland Irrigation Research Institute
Paiguan Jixie Gongcheng Xuebao/Journal of Drainage and Irrigation Machinery Engineering | Year: 2014

This study was conducted to find an irrigation scheme for greenhouse grown tomato with high quality and efficiency based on evaporation determination from a 20 cm standard diameter pan placed above the crop canopy. Three irrigation intervals based on accumulate pan evaporation (Epan) values and four irrigation level combination treatments were designed. By means of results of plot experiment in greenhouse, the evaluation system of irrigation scheme with water saving and good quality for greenhouse grown tomato was determined by five main indexes such as tomato yield, water use efficiency, mean fruit weight, content of soluble solids and fruit firmness. Based on the weight of each index calculated by varia-tion coefficient method, a comprehensive evaluation model with high quality, yield and efficiency was further established with TOPSIS method. Using the evaluation model, irrigation scheme with water sa-ving and good quality was determined based on pan evaporation. Irrigation was occurred when Epan reached 10 mm ± 2 mm with 0.9 Epan irrigation water applied, which could improve water utilization efficiency, fruit nutritional and storage quality in some certain extent without yield reduction.

Yin W.-D.,Chinese Academy of Agricultural Sciences | Qiu G.-S.,Chinese Academy of Agricultural Sciences | Yan W.-T.,Chinese Academy of Agricultural Sciences | Sun L.-N.,Chinese Academy of Agricultural Sciences | And 3 more authors.
Journal of Economic Entomology | Year: 2013

To understand the influence of different apple varieties on the development and reproduction of the European red mite, Panonychus ulmi (Koch) (Acari: Tetranychidae), age-stage two-sex life tables of P. ulmi on 'Fuji,' 'Starkrimson Delicious,' 'Golden Delicious,' and 'Granny Smith' varieties were constructed under laboratory conditions at 23 ± 1°C, 75 ± 5% relative humidity, and a photoperiod of 16:8 (L:D) h. Results showed that total development time of immature females was shorter on Fuji than on the other varieties, and this was because of its shorter egg duration. Immature survival of P. ulmi was 74.51-78.00% among four apple varieties, and no significant differences were found. The total fecundity per female was significantly higher on Golden Delicious (34.12 eggs per female) than that on Fuji (27.15 eggs per female), Starkrimson Delicious (25.15 eggs per female), and Granny Smith (20.62 eggs per female). Based on the intrinsic rate of population increase, Fuji and Golden Delicious were more suitable than Starkrimson Delicious and Granny Smith. © 2013 Entomological Society of America.

Xu T.,CAS Institute of Remote Sensing | Xu T.,University of Chinese Academy of Sciences | Liao J.-J.,CAS Institute of Remote Sensing | Shen G.-Z.,CAS Institute of Remote Sensing | And 5 more authors.
Hongwai Yu Haomibo Xuebao/Journal of Infrared and Millimeter Waves | Year: 2016

Leaf area index (LAI) is an important indicator of wetland ecosystem health. Poyang Lake wetland vegetations grow densely, with LAI of large dynamic range. Considering the complex scattering mechanisms of radar data, a radar vegetation index was defined. To overcome the saturation of the optical vegetation indices, a new integrated vegetation index using GF-1 and Radarsat-2 data was established for estimation of wetland vegetation LAI. The validation of measured data and theoretical model simulation showed that this integrated vegetation index is a good alternative to that using only the optical or radar observation. The best fitting models were built with optical vegetation indices, radar vegetation index, and the integrated vegetation index, respectively. The result indicates that the integrated vegetation index can improve predication accuracy for wetland vegetation LAI. © 2016, Chinese Optical Society. All right reserved.

Zhang X.X.,Farmland Irrigation Research Institute | Fan X.Y.,Chinese Academy of Agricultural Sciences | Li Z.Y.,Chinese Academy of Agricultural Sciences
Water Resources Research | Year: 2016

Tracy et al. (2015, doi: 10.1002/2014WR016020) assumed in their recent paper that water velocity at the water-air interface is zero in their pore-scale simulations of water flow in 3-D soil images acquired using X-ray computed tomography. We comment that such a treatment is physically wrong, and explain that it is the water-velocity gradient in the direction normal to the water-air interface, rather than the water velocity, that should be assumed to be zero at the water-air interface if one needs to decouple the water flow and the air flow. We analyze the potential errors caused by incorrectly taking water velocity at the water-air interface zero based on two simple examples, and conclude that it is not physically sound to make such a presumption because its associated errors are unpredictable. © 2016. American Geophysical Union. All Rights Reserved.

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