摘要： 在3种不同施氮历史的露地菜田中,进行了花椰菜残留物翻压试验,对残留物中氮矿化及其对土壤无机氮含量、下茬蔬菜产量及氮营养状况等的影响进行了研究.研究结果表明,试验期间,3种不同施氮历史的处理中,残留物中氮矿化率分别达161.2%,78.8%和73.8%.残留物的施用不同程度地增加了土壤N min含量,但其对下茬苋菜产量、氮吸收的影响因氮处理的不同而有很大差异.在土壤氮水平高的Nt处理中,施用残留物对苋菜产量及氮素吸收量没有明显影响;而在土壤氮水平较低的Nt及Nr'处理中,残留物的施用显著提高了苋菜产量及氮素吸收量.
关键词:
花椰菜残留物,
氮矿化,
土壤无机氮,
苋菜产量,
氮素利用
Abstract: N mineralization of cauliflower residues and it's effects on soil mineral N content, N nutrition and yield of vegetable (Amaranthus spp. )was studied in field. Three nitrogen treatments were included, such on Nt, Nr and Nr'.The N mineralization of cauliflower residues were 161.2%, 78.8% and 73.8% respectively for the three nitrogen treatments. The application of cauliflower residues increased soil Nmin concentration. However, it' s effects on yield and nitrogen uptake by amaranth vary among differnet nitrogen treatments. In Nt treatment with high N level, the application of residues has no significant effects on amaranth yield and nitrogen uptake, but in Nr and Nr' treatment with low N level, the application of residues significantly increased the yield and nitrogen uptake by amaranth.
Key words:
Cauliflower residues,
Mineralization,
Soil Nmin,
Amaranth,
N utilization
中图分类号:
张宏彦, 陈清, 汤丽铃, 李晓林, 张福锁. 花椰菜残留物氮矿化及其对下茬蔬菜产量及氮吸收的影响[J]. 华北农学报, 2003, 18(3): 102-105. doi: 10.3321/j.issn:1000-7091.2003.03.029.
ZHANG Hong-yan, CHEN Qing, TANG Li-ling, LI Xiao-lin, ZHANG Fu-suo. N Mineralization of Cauliflower Residues and It's Effects on Yield and Nitrogen Uptake of Vegetables[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2003, 18(3): 102-105. doi: 10.3321/j.issn:1000-7091.2003.03.029.