摘要： 为了寻求水肥资源的合理利用方式,以九农21为材料,于2008年研究了遇旱灌水和施肥方式对大豆各生育期、各土层土壤中铵态氮和硝态氮变化的影响。结果表明,从各土层土壤中的铵态氮和硝态氮含量来看,灌水前优化施肥处理对保持土壤中的铵态氮和硝态氮含量效果明显,尤其是R1和R5期,减少了土壤中的氮损失。用地质统计学中的区域化变量理论和半方差函数分析,从变程值来看,灌水对优化施肥处理的铵态氮和硝态氮空间变异性程度影响较大;此外块金值与基台值之比较小,分别为0.02和0.21,表明由土壤的空间结构本身引起的空间变异性占主要部分,说明优化施肥处理对改变土壤的空间结构具有良好的作用。
关键词:
大豆,
土壤,
灌水,
施肥方式,
铵态氮,
硝态氮,
半方差,
时空变异
Abstract: To seek a rational way of utilizing water and fertilizer,taking Jiunong 21 as material,the effect of irrigation and fertilization on spatial-temporal variations of NH4+-N and NO3--N in soybean fields in 2008 was studied.The results showed that,seen from NH4+-N and NO3--N in different soil layers,optimized fertilization treatment has obvious effect on keeping NH4+-N and NO3--N in soil,especially at R1 and R5 stages,reducing the loss of soil nitrogen.By the regionalized variable theory and semivariance of geostatistics,seen from range value,irrigation has larger effect on spatial variability of soil NH4+-N and NO3--N of optimized fertilization treatment;and smaller C0/C value,0.02 and 0.21,respectively,indicating that spatial structure was the main cause of spatial variability,thus optimized fertilization treatment has a good effect on changing soil spatial structure.
Key words:
Soybean,
Soil,
Irrigation,
Fertilization mode,
NH4+-N,
NO3--N,
Semivariance,
Spatial-temporal variations
中图分类号:
赵婧, 王树文, 邱强, 张宝贵, 张伟, 张鸣浩, 闫晓艳, 冯利平, 刘庆军, 刘淑琴. 遇旱灌水和施肥方式对大豆土壤中铵态氮和硝态氮时空变异的影响[J]. 华北农学报, 2014, 29(S1): 305-309. doi: 10.7668/hbnxb.2014.S1.057.
ZHAO Jing, WANG Shu-wen, QIU Qiang, ZHANG Bao-gui, ZHANG Wei, ZHANG Ming-hao, YAN Xiao-yan, FENG Li-ping, LIU Qing-jun, LIU Shu-qin. Effects of Irrigation and Fertilization on Spatial-temporal Variations of NH4+-N and NO3--N in Soybean Fields[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2014, 29(S1): 305-309. doi: 10.7668/hbnxb.2014.S1.057.