摘要
通过在耕作红壤和黄壤上施用尿素轮作马唐和冬萝卜,研究了春秋两季两种土壤尿素氨挥发损失的状况。结果表明,红壤和黄壤尿素氨挥发通量的趋势具有一致性,其最大值分别均出现在春季基肥的第7～8d,秋季基肥的第7～8d,模拟降雨追肥的第1～2d。同种施尿素氮水平和养分管理下,氨挥发春季高于秋季,黄壤高于红壤。其中春季氨挥发红壤和黄壤分别为0.67和7.84kg.hm-2,占施用氮素0.42%和4.90%;秋季氨挥发红壤和黄壤分别为3.04和3.75kg.hm-2,占施用氮素的1.21%和1.50%。差异显著性检验表明,春季红壤与黄壤氨挥发通量差异达到比较显著水平(P<0.1),秋季基施和追施红壤和黄壤氨挥发通量差异均未达到显著水平。
N-loss of ammonia-volatilizing from urea applied in both red soil and yellow soil were studied with Digitaria ischaemum- winter radish rotation cropping system between spring and autumn. The results showed that there was a coherence in ammonia flux both two types of soil, and maximum of the ammonia-volatilizing flux appeared after 7 -8 days when urea was applied as basic fertilizer in spring, made it after 7 - 8 days when urea was applied as basic fertilizer and emerged 1 -2 days since urea was applied with simulating rainfall as additional fertilizer in autumn. With the same condition of urea rate and nutrient management, ammonia-volatilizing in spring was higher than in autumn and in yellow soil was better than in red soil. In spring, ammonia-volatilizing was 0. 67 kg · hm^-2 ,accounting for 0. 42% for N applied in red soil and that was 7.84 kg · hm^-2 , accounting for 4.90% in yellow soil. In autumn, ammonia-volatilizing was 3.04 kg · hm^-2, accounting for 1.21% for N applied in red soil and that was 3.75 kg · hm^-2, accounting for 1.50% in yellow soil. Besides,the differences of ammonia flux by volatilization were more significant between in red soil and in yellow in spring （ P 〈 0. 1 ） while that were no significance both ammonia capacity and flux in different soils in autumn.
出处
《安徽农业大学学报》
CAS
CSCD
北大核心
2007年第2期265-269,共5页
Journal of Anhui Agricultural University
基金
国家自然科学基金项目(40305019)
中国科学院资助知识创新工程项目(KZCX2-413)共同资助
关键词
轮作
红壤
黄壤
尿素
氨挥发
rotation
red soil
yellow soil
urea
ammonia-volatilizing
