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Wang X.,Northwest University, China | Tong Y.,Northwest University, China | Tong Y.,Key Laboratory of Plant Nutrition and Agricultural Environment in Northwest | Gao P.,Northwest University, China | And 4 more authors.
Journal of Chemical and Pharmaceutical Research | Year: 2014

In order to study the effects of formulated fertilization, irrigation and different varieties on crop yields and farmer’s income, this research used household survey data and demonstration test data of formulated fertilization, which was collected from the project of soil testing and formulated fertilization in Shaanxi province from 2007 to 2011. For analysis, there were a total of 53 counties in the sample. The results show that in Weibei, Guanzhong and Qin-Ba regions, compared with conventional fertilization, formulated fertilization decreased nitrogen (N) fertilizer rates by 31.92%, 12.59% and 10.13% respectively, decreased phosphate (P2O5) fertilizer rates by 20.44%, 2.10% and 26.19% respectively, increased potassium (K2O) fertilizer rates by 105.98%, 193.99% and 382.58% respectively. The yields of wheat improved 330 kg ha-1, 403 kg ha-1 and 738 kg ha-1, the yield increase rates were 7.73%, 6.26% and 19.71%, the average profits increased about 906 yuan ha-1, 689 yuan ha-1 and 1423 yuan ha-1 respectively in the three regions. In addition, the average yields were higher up to 19.07%, 14.96% and 17.76% respectively when irrigation had been used than without, and it was not the most productive varieties that were the most grown in the three regions. Therefore, the focus of the wheat production in the future must pay more attention to the formulated fertilizer application, conduct rational irrigation and encourage the use of more productive varieties, to provide effective protection for the province and to enhance national food security. © 2014, Journal of Chemical and Pharmaceutical Research. All rights reserved. Source


Wang X.,Northwest University, China | Tong Y.,Northwest University, China | Tong Y.,Key Laboratory of Plant Nutrition and Agricultural Environment in Northwest | Gao P.,Northwest University, China | And 4 more authors.
International Agricultural Engineering Journal | Year: 2014

In order to understand the current status of fertilization and nutrients resource input problems of households on wheat in Shaanxi, and to put forward countermeasures to solve the problems, we used household survey data, which were collected from the project of soil testing and formulated fertilization from 2005 to 2012, to evaluate the situation. There were totally 53 counties and 21,756 households. The results showed that inorganic N, P2O5 and K2O inputs averaged 183,110 and 21 kg/hm2, respectively for the whole province. Organic manure inputs were very low, and the ratio of households who used organic manure was 23.7%. Inorganic fertilizer NPK rates and organic manure rates had highly significant correlation with yield in all regions. Compared with the rational levels of fertilizer rates, the ratio of households using excessive inorganic N inputs was 68.4%, the ratios of households using excessive and insufficient inorganic P2O5were 41.0% and 38.1% respectively, and the ratio of households using insufficient inorganic K2O inputs was 77.5% for the whole province. In addition, wheat yield could be increased by 249,000 t if the households fertilizing with insufficient level of inorganic NPK fertilizers increased the fertilization rate to a rational level The current status of household fertilization on wheat in Shaanxi province was that nitrogen fertilizer inputs was excessive, phosphate fertilizer inputs were both excessive and insufficient, and potassium fertilizer and organic manure inputs were both insufficient Therefore, increasing organic manure inputs, significantly reduced nitrogen fertilizer inputs and reasonable application of phosphate fertilizer should be concerned for households in Shaanxi. Source


Wang X.-Y.,Northwest University, China | Wang X.-Y.,Key Laboratory of Plant Nutrition and Agricultural Environment in Northwest | Liu F.,Northwest University, China | Liu F.,Key Laboratory of Plant Nutrition and Agricultural Environment in Northwest | And 4 more authors.
Chinese Journal of Applied Ecology | Year: 2013

In order to understand the present situation of rice fertilization and the existing problems in the farmers' nutrient resources input in the Qin-Ba mountainous area of southern Shaanxi, the survey data from 2854 households in 11 counties of this area in the project "soil testing and formulated fertilization in 2006-2009" were analyzed and evaluated, and the countermeasures for the existing problems in the farmers' nutrient resources input were proposed. In the study area, the average rice yield was 7822 kg·hm-2 per year, and the ratio of the households obtained the medium level yield was up to 50.9%. The input of the total fertilizers N, P2O5, K2O was 169, 68, and 54 kg·hm-2, and the chemical fertilizer rate was 159, 62, and 45 kg·hm-2, with the partial factor productivity (PFP) of the N, P2O5, and K2O being 51.52, 135.69, and 158. 26 kg·kg-1, respectively. According to the nutrient fertilization level, the proportion of the households fertilized with rational level of chemical N, P2O5, and K2O occupied 48.0%, 42.4%, and 7.2%, that of the households fertilized with excessive level was 22.6%, 11.2%, and 0.6%, and the proportion of the households fertilized with insufficient level occupied 29.4%, 46.5%, and 92.2%, respectively. The rice yield in the Qin-Ba mountainous area could be increased by 77 thousand tons if the households fertilizing with insufficient level of chemical NPK fertilizers increased the fertilization rate to a rational level. The existing problems in the farmers' nutrient resources input were mainly the coexistence of excessive and insufficient application of nitrogen and phosphate fertilizers and the insufficient input of potassium fertilizer and organic manure. In the rice fertilization in this area, the focus would be the balanced application of nitrogen and phosphate fertilizers, the increase of the fertilization rates of potassium fertilizer and organic manure, and the increase of top dressing, especially potassium. Source

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