摘要
红壤施用石灰１０年的田间试验和盆栽试验的结果表明：（１）施用石灰能降低土壤酸度，增加土壤中交换性Ｃａ和Ｍｇ含量，从而导致作物产量的提高；（２）底土酸度的降低随时间的推移和石灰用量的增大而增强，每公顷施用３．２５－１５．０吨石灰石粉的降酸和增产效应至少可维持１０年以上；（３）每公顷施用７．５吨石灰石粉能显著提高土壤有机质、全氮及速效磷含量；（４）土壤有效锌和有效铜含量随ｐＨ升高而增加，并与有机质含量呈正相关，相关系数分别为ｒ＝０．９６５（ｎ＝５）和ｒ＝０．８８７（ｎ＝５）。土壤有机质、有效磷、有效锌及有效铜的含量随上层深度增加而减少；（５）缺磷的酸性土壤，磷肥与石灰配施对增产效应更大。
The results of a 10-year liming
field experiment and pot experiment indicatedthat(1) the reduction in the soil acidity and the
increase in the contents of ex-changeable Ca and Mg after application of powdered limestone
resulted in the yieldincrease of green grain; (2)the reduction in soil acidity of the subsoil
increasedas the time of application of powdered limestone prolonged and lime rate
increased,the effects of reducing soil acidity and increasing the yields of the crops couldlast at
least 10 years; (3)the treatment with 7.5t/ha powdered limestone signifi-cantly increased the
contents of organic matter,total N, and available P;(4)thecontents of available Zn and Cu of the
soil increased as the pH increased and weresignificantly related to organic matter content of
the soil,those correlation coeffio-ients were 0.965(n=5)and 0.887(n=5),respectively;(5)the
contents oforganic matter available Zn,and available Cu decreased with the increase of
soildepth and(6) for red soil deficient in P,application of lime in combination withphosphorus
fertilizer had an even better effect on the yield increase of soybeams.
出处
《土壤学报》
CAS
CSCD
北大核心
1995年第3期300-307,共8页
Acta Pedologica Sinica
基金
"八五"国家攻关专题
关键词
红壤
PH值
石灰
有效磷
锌
铜
Red soil
pH
Liming
Available P,Zn,and Cu
