文档介绍：河西学院农业与生物技术学院种子科学与工程专业2014届本科生毕业论文
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编号 1151508125
毕业论文
（ 2015 届本科）
题
14
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第一部分
摘 要
摘 要：为了解决河西内陆灌区制种玉米田有机质含量低，土壤板结，贮水性能差的问题，在甘肃省张掖市甘州区沙井镇古城村连续种植制种玉米10年的基地上，采用田间试验方法，研究了抗旱性专用肥对土壤理化性质和玉米经济效益的影响。结果表明：抗旱性专用肥施用量与土壤孔隙度、团聚体、持水量、有机质、速效氮磷钾和玉米穗粒数、穗粒重、百粒重、产量呈正相关关系，与土壤容重呈负相关关系。随着抗旱性专用肥施肥量梯度的增加，玉米产量在增加，而边际产量、边际产值和边际利润在递减，，边际利润出现负值。经回归统计分析，抗旱性专用肥施用量与玉米产量间的肥料效应回归方程为：y=++，。
关键词：抗旱性专用肥；土壤理化性质；玉米；经济效益
河西学院农业与生物技术学院种子科学与工程专业2015届本科生毕业论文
河西学院农业与生物技术学院种子科学与工程专业2015届本科生毕业论文
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Drought resistance specific fertilizer on soil physical and chemical properties and the effect of water holding capacity and maize yield
Abstract
Abstract: in order to solve the hexi inland irrigation seed corn field low organic matter content, soil harden and problems about the worse performance of water storage, in gansu province zhangye ganzhou district ShaJing Town gucheng village seed corn 10 years in a row, on the base of using field experiment method, studies the differences of specific fertilizer on soil physical and chemical properties and the influence of the economic benefit of results showed that the drought resistance applying urea content, aggregate, water holding capacity and soil porosity, organic matter, available NPK and ear of corn grain number and grain weight, hundred grain weight, yield was positively related to relationship, and negatively correlated with soil bulk the increase of drought resistance gradient urea fertilizer, maize yield increases, the marginal output, marginal output value and profit margins are decreasing, drought resistance urea fertilizer rate is greater than t/hm2, negative marginal the regression statistical analysis, drought resistance between applying urea content and maize yield fertilizer effect of the regression equation is: y = + + 138