应用生态学报2011，Vol.22Issue(12)：3221-3226,6.
玉米秸秆还田对石灰性土壤Zn形态及其有效性的影响
Effects of returning maize straw into field on the Zn forms and their availability in a calcareous soil
摘要
Abstract
Maize straws were put into nylon mash bags and buried in a calcareous soil to study the effects of returning maize straw into field on the calcareous soil Zn forms and their availability. Compared with Zn fertilization, returning maize straw into field had little contribution to the soil total Zn content. Both Zn fertilization and straw returning increased the soil DTPA-Zn content significantly , and the increment was larger under Zn fertilization. As compared to that in low Zn concentration straw, the Zn released from high Zn concentration straw after returned into soil was more easily transformed into soil DTPA-Zn, with the transformation rate reached 49.0%. The transformation rate of soil DTPA-Zn had a trend of decreasing first and increasing then after straw returned into soil, but had little change under Zn fertilization. The soil exchangeable Zn (Ex-Zn) , carbonate bound Zn ( Carb-Zn ) , manganese oxide bound Zn ( OxMn-Zn) , tightly organic bound Zn ( SboZn) , and mineral Zn (Min-Zn) contents had no significant differences among the treatments, but the soil weakly organic bound Zn ( Wbo-Zn) content was significantly higher under Zn fertilization, compared with the treatments control and straw addition alone. It was considered that the Zn in maize straw could be easily transformed into soil DTPA-Zn, though the Zn concentration in straw was rather low. Therefore, Zn fertilization combined with returning maize straw into filed could be an effective way to improve the Zn supply capacity of calcareous soil.关键词
玉米秸秆/施Zn/形态/生物有效性石灰性土壤Key words
maize straw/ Zn fertilization/ form/ bioavailability/ calcareous soil分类
农业科技引用本文复制引用
崔娟,田霄鸿,陆欣春,任思潮,代二战..玉米秸秆还田对石灰性土壤Zn形态及其有效性的影响[J].应用生态学报,2011,22(12):3221-3226,6.基金项目
国家自然科学基金项目(40971179,31071863)和西北农林科技大学创新团队建设项目(2010)资助. （40971179,31071863）
