以云南省玉溪市红塔区北城镇唐家营已施用农药和化肥20余 a 的农户农田土壤为研究对象. 通过为期8周的实验研究,设计5组不同浓度梯度的环保酵素液,施浇于土壤,研究环保酵素对土壤有机 质、全磷以及有效磷的改良效果.试验结果表明：环保...以云南省玉溪市红塔区北城镇唐家营已施用农药和化肥20余 a 的农户农田土壤为研究对象. 通过为期8周的实验研究,设计5组不同浓度梯度的环保酵素液,施浇于土壤,研究环保酵素对土壤有机 质、全磷以及有效磷的改良效果.试验结果表明：环保酵素有利于提高土壤有机质、全磷和有效磷的含量;施浇环保酵素浓度梯度在1：500和1：750,持续施浇环保酵素6 -7周,其土壤改良效果最佳.展开更多
In this paper, we give some constructions of self-conjugate self-orthogonal diagonal Latinsquares (SCSODLS). As an application of such constructions we disproof the conjecture aboutSCSODLS and show that there exist SC...In this paper, we give some constructions of self-conjugate self-orthogonal diagonal Latinsquares (SCSODLS). As an application of such constructions we disproof the conjecture aboutSCSODLS and show that there exist SCSODLS of order V, whenever w=1 (mod 12), with thepossible exception of v∈ {13, 85, 133}.展开更多
文摘In this paper, we give some constructions of self-conjugate self-orthogonal diagonal Latinsquares (SCSODLS). As an application of such constructions we disproof the conjecture aboutSCSODLS and show that there exist SCSODLS of order V, whenever w=1 (mod 12), with thepossible exception of v∈ {13, 85, 133}.
