摘要
本研究以华北平原的潮土为对象,以5%的比例施用秸杆、马粪和猪粪、进行了盆钵培养试验,培养一年的结果表明:1.施用有机物料使0.25～0.05mm 粒级的微团聚体增加;0.05～0.01mm 粒级减少;<0.01mm 各粒级变化相对较小。随微团聚体粒径变小,其易氧化有机质和有机质含量有增加的趋势。施用有机物料使各粒级微团聚体中的有机质和易氧化有机质增加,并以>0.01mm 粒级的易氧化有机质增加较多。2.施有用机物料使土壤对磷的吸持能力降低,各有机处理中以猪粪降低的能力最强。>0.01mm 的微团聚体吸持磷的能力远较<0.01mm 者小。施用有机物料后,<0.01mm 粒级,尤其<0.005mm 粒级的微团聚体对磷的吸持能力提高,而>0.01mm者吸持磷的能力下降。
This research deals with the influence of pig manure,horse manure and wheat straw on the microaggregate in three alluvial soils collected from Qing Yuan County in Hebei province.The soils were mixed with 5% organic material and then incubated in pots.for one year.After this time, samples were classified into five fractions according to the following dia- meters:0.25—0.05mm,0.05—0.01mm,0.01—0.005mm,0.05—0.002mm,and <0.002mm.The results obtained will be summarized in a series of articles This,the first paper,contains data relating to the content of organic matter in various fractions of microaggregate,the oxidizability of the orga- nic matter,and phosphate adsorbability.The results are a set out below, The>0.01mm fraction of microaggregate was the major component in three soils,constituting 75% per cent of the total soil weight,with the application of organic materials,the 0.25—0.05mm fraction was increased,the 0.05—0.01mm fraction decreased and the 0.01mm fraction almost unchanged As the mieroaggrogate became small,the content of organic matter and oxidizable organic matter tended to increase.After treatment with organie materials,the content of organic matter and oxidizable organic matter increased in every microaggregate fraction;however,the content of oxidi- zable organic matter increased more in the>0.01mm fraction than in the <0.01mm fraction. The applied organic materials reduced the phosphate adsorbability of the soils and increased the release ablity of the phosphate adsorbed.There was a positive correlation between phosphate adsorbability and the oxidi- zable organic matter content.The phosphate adsorbability of the>0.01mm fraction was much lower than that of the<0001mm fraction.Moreover, with the application of the organic materials the phosphate adsorbability of the<0.01mm fraction rose and that of the>0.01mm fraction fell.
出处
《河北农业大学学报》
CAS
CSCD
北大核心
1989年第3期28-34,共7页
Journal of Hebei Agricultural University
关键词
有机肥料
潮土
微团聚体
Organic manure
Alluvial soils
Microaggregate
