摘要
采用盆栽试验方法,研究了施入经过预处理的水稻秸秆(预处理秸秆)后土壤的供N特征和菠菜产量与品质的变化。研究结果表明,经预处理后,秸秆中纤维素、半纤维素和二氧化硅的含量显著降低,但可溶性物质含量显著增加;预处理稻秆与N肥配合使用,土壤中微生物量N、有效态N(NO3--N和NH4+-N)含量显著增加,并且在供N方式上具有鲜明的渐进性和持续性;第41天时每钵菠菜的鲜重比对照增产81.4%,菠菜中Vc含量高于单施尿素处理,硝酸盐积累量低于单施尿素处理。可见预处理稻秆配施N肥能显著改善土壤的供N能力,提高菠菜的产量和品质。
Pot experiment was carried out to study the effect of the application of chemically pretreated rice straw (TS) on soil nitrogen supply and spinach growth and quality. After chemical pretreatment, the amount of cellulose, semi-cellulose and the silicon dioxide in TS was decreased, and the water-soluble substances increased. Application of TS with urea remarkably increased soil microbial biomass nitrogen and available nitrogen. Thus soil could supply the nitrogen to the spinach in a better synchronized way to the crop requirement. Compared with control, the application of the TS with urea (TS+N) increased the fresh weight of spinach per pot by 81.4% at the 41st day. The higher content of Vc and lower content of nitrate of the spinach was found in the treatment of TS+N than that in the treatment of single application. In conclusion, Crop straw could be better used in agriculture after it was pretreated in certain ways.
出处
《土壤》
CAS
CSCD
北大核心
2004年第1期37-42,共6页
Soils
基金
国家科技部863项目(2001AA246091)
关键词
预处理秸秆
供N能力
菠菜
产量品质
Pretreated rice straw, Nitrogen supply, Spinach, Growth and quality
