【摘要】 为了寻找快速、简便、精确地测量液体蛋鸡粪便中总氮(TN)、总磷(TP)、有机物(OM)、铵态氮(AN)和总钾(TK)含量的方法,研究了采样前将样品搅拌或静置对所取样品代表性的影响,并用75份生长期为4~6月龄蛋鸡的液体粪便样本建立了密度(SG)与TN、TP、OM,电导率(EC)与AN和TK的一元线性回归模型以及SG、EC、pH与TN、TP、OM、AN和TK的多元线性回归模型。结果表明,对于TN、TP、OM、AN,采样前将样品充分搅拌是获得代表性样本的前提条件,而搅拌与否并不影响TK代表性样本的获得。SG与TN、TP、OM,EC与AN和TK均存在显著的线性相关性(P<0.001),模型的决定系数(R2)均较高,分别为0.94,0.94,0.95,0.94和0.94,多元线性模型的决定系数高于一元线性模型的决定系数。用另外15份样本对5个一元线性回归模型进行验证,并对模型系数b和常数项a进行t检验,得出在显著水平α=0.05上,假设Ha0:^a=0和Hb0:^b=1全部接受。由此认为,SG与TN、TP和OM,EC与AN和TK所建立的一元线性回归模型均具有较好的预测效果。更多还原

【Abstract】 The present study takes it as its objectives to find the relations between the physical and chemical properties and the fertilizer content of layer manure and determine the efficacy of a representative manure sample.For the above objectives,we have done careful testing and examinations on the total nitrogen(TN),total phosphorus(TP),organic matters(OM),ammonium nitrogen(AN) and the total potassium(TK) in the layer manure,with two manure agitation procedures being investigated and analyzed.At the same time,single and multiple regressions between physical and chemical properties,such as the specific gravity(SG),the electrical conductivity(EC) and pH and nutrient contents of 75 samples of 4-6 months layer manure including TN,TP,OM,AN and TK have also been studied.The results of our investigation and research show that for TN,TP,OM and AN,it is the most important step to get a representative sample in the liquid layer manure is to make enough mixing.As for TK,a typical sample has been obtained both for the mixed sample and the unmixed one.So far as it can be seen,there exist significant linear relationships between SG and TN,TP,OM,EC and AN,TK.While the coefficients of determination prove to be 0.94,0.94,0.95,0.94 and 0.94,respectively,the coefficients of determining the multiple properties regressions turn to be higher than the simple ones.In addition,the residual 15 samples of layer manure have also been selected to examine the prediction abilities of the five simple regression equations between SG and TP,TN,OM,EC and AN,TK.Statistical t-test has been performed on the coefficient and constant of the equations established by the values checked with the standard laboratory means versus the five single equations.The hypothesis test of the estimation equations has been on the whole accepted at the significant level of α=0.05.Thus,it can be said that the five single regression equations may have predictive capacities.更多还原