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陕南秦巴山区水稻施肥现状评价

王小英1,2,刘芬1,2,同延安1,2**,赵佐平1,3   

  1. (1西北农林科技大学资源环境学院, 陕西杨凌 712100; 2农业部西北植物营养与农业环境重点实验室, 陕西杨凌 712100; 3陕西理工学院, 陕西汉中 723001)
  • 出版日期:2013-11-18 发布日期:2013-11-18

Present situation of rice fertilization in Qin-Ba mountainous area of southern Shaanxi, China.

WANG Xiao-ying1,2, LIU Fen1,2, TONG Yan-an1,2, ZHAO Zuo-ping1,3   

  1. (1College of Resources and Environmental Sciences, Northwest A&F University, Yangling 712100, Shaanxi, China; 2Key Laboratory of Plant Nutrition and Agricultural Environment in Northwest, Ministry of Agriculture, Yangling 712100, Shaanxi, China; 3Shaanxi University of Technology, Hanzhong 723001, Shaanxi, China)
  • Online:2013-11-18 Published:2013-11-18

摘要: 为了解陕南秦巴山区水稻施肥现状及农户养分资源投入中存在的问题,提出解决问题的对策,对测土配方施肥项目2006—2009年的11个县2854户调查数据进行了分析和评价.结果表明: 陕南秦巴山区水稻平均产量为7822 kg·hm-2,中等产量农户所占比例为509%.总氮(N)、磷(P2O5)、钾(K2O)养分投入量分别为169、68、54 kg·hm-2,其中化肥氮(N)、磷(P2O5)、钾(K2O)养分投入量分别为159、62、45 kg·hm-2,偏生产力分别为51.52、135.69和158.26 kg·kg-1.根据养分分级等级,农户化肥氮、磷、钾投入合理比例分别为48.0%、42.4%和7.2%,过量比例分别为22.6%、11.2%和0.6%,不足比例分别为29.4%、46.5%和92.2%.如果化肥养分投入不足的农户将施肥量增加到合理水平,陕南秦巴山区水稻可增产7.70万t.该区域水稻施肥存在的问题主要包括:氮肥和磷肥投入过量和不足并存,钾肥和有机肥投入不足.今后该区域水稻施肥的重点是平衡氮肥和磷肥用量,增加钾肥和有机肥用量,增加追肥尤其是钾肥的施用.

Abstract: 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.