甘肃河西灌区不同种植年限玉米制种田土壤理化性质变化的研究  

Effect of Maize Seed Production Field in Different Planting Years on Soil Physical and Chemical Properties in Hexi Irrigation Area

作　　者：张红菊[1] 赵怀勇 秦嘉海[1] 

机构地区：[1]河西学院农学系,甘肃张掖734000 [2]甘肃张掖市农业技术推广站,甘肃张掖734000

出　　处：《土壤通报》2011年第3期612-615,共4页Chinese Journal of Soil Science

基　　金：国家科技支撑计划基金项目(2007BAD89B17);甘肃科技支甘项目(1011JKCF180);甘肃省高等学校2010年研究生导师科研项目(1009B-05);甘肃省高校河西走廊特色资源利用省级重点实验室项目(XZ1002)资助

摘　　要：在河西灌区灌漠土上连续种植制种玉米2、4、6、8、10 a的地块为标准样品采集区,取0-20 cm耕层土样30个室内化验分析土壤理化性质。研究结果表明：随着玉米种植年限的延长,土壤孔隙度、碱解N、速效P、可溶性盐含量在递增,二者呈正相关。土壤容重、速效K随着玉米种植年限的延长在递减,二者呈显著的负相关。种植玉米2-8 a土壤有机质含量虽然随玉米种植年限的延长而增加,但增加的幅度不大,种植玉米10 a后,土壤有机质表现出下降的趋势。土壤pH随着制种玉米种植年限的延长而降低,连续种植玉米10 a土壤pH任趋于中性,不会对土壤理化性质产生不良的影响。The plots of standard samples were selected in irrigated desert soil of Hexi irrigation area with continuous plantation of maize for 2,4,6,8 and 10 years.30 soil samples in 0-20 cm plow layer soil were analyzed for physical and chemical properties in laboratory.The results showed as follows.With the extension of maize planting years,soil porosity and the contents of alkali N,available P and soluble salt gradually increased and positively correlated with plantation time However,soil bulk density and available K gradually decreased and showed a negative correlation with plantation time.The soil organic matter content under 2-8 years＇ of plantation increased with slight degree but showed a downward trend after 10-year plantation.The pH of soil decreased with the increase of plantation time and became neutral after 10-year plantation which had no negative impact on the soil physical and chemical properties.

关 键 词：河西灌区 玉米制种 种植年限 理化性质 

分 类 号：S157.4[农业科学—土壤学]