摘要
采用田间试验和室内培养相结合的方法研究不同磷、钾水平土壤上秸秆和磷钾肥配施对土壤Olsen-P、速效钾和小麦产量的影响。结果表明：不同磷水平土壤上施用磷肥均显著增加土壤有效磷含量,单位磷肥所增加的土壤Olsen-P随土壤磷水平的增加而增加,差异达到显著水平。不同磷水平土壤上单施磷肥、秸秆和磷肥配施,土壤对磷肥的固定率均随施肥时间的增加而增加,施用秸秆明显降低了土壤固磷率。不同钾水平土壤上施钾肥显著增加土壤速效钾的含量。磷肥用量45~135kg/hm^2,施用秸秆与不施用秸秆下小麦产量分别增加8.4%~22.2%和6.2%~13.2%,差异达显著水平;钾肥用量22.5~67.5kg/hm^2,施用秸秆与不施用秸秆小麦产量分别增加5.0%~12.7%和6.1%~15.0%,秸秆还田明显增加了磷、钾肥在冬小麦上的产量效应。
Field experiments by fertilization and soil cultivation methods were carried out to study the effects of straw management on Olsen-P, available K contents and wheat production in different levels of soil . The results showed that phosphate fertilizer application on different levels of soil Olsen-P significantly increased soil Olsen-P content, and the unit volume of soil phosphate fertilizer addition in Olsen-P of the soil was increased with the amount of soil Olsen- P, the difference was significant. Both using P fertilizer only and straw coordinate with P fer- tilizer, soil phosphorus fixed rate increased with prolonging of time, straw application signifi- cantly reduced the rate of soil phosphorus fixation. Potash fertilizer application to the soil with different levels of available K significantly increased soil available K content. When phosphate fertilization rate was 45--135 kg/hm^2, straw application and without straw application in- creased wheat yield by 8.4%--22.2% and 6.2%--13.2% respectively, and their difference was significant. When potash fertilization rate was 22.5-67.5kg/hm^2 , straw application and without straw application increased wheat yield by 5.0%--12.7% and 6.1 %--15.0% respec-tively. Straw management significantly increased the effect of phosphate and potash fertiliza- tion f on the yield of winter wheat.
出处
《河北农业大学学报》
CAS
CSCD
北大核心
2014年第6期7-12,共6页
Journal of Hebei Agricultural University
基金
河北省科技厅项目(12220204D)
关键词
秸秆还田
磷肥固定率
有效磷
速效钾
冬小麦
straw incorporation
phosphate fixed rate
Olsen-P
available K
winter wheat
