氮磷钾对杂草生长影响的研究

试验设 CK(无肥 ) ,N,NP,NPK,有机肥 (Om) ,Om+N,Om+NP,Om+NPK等 8个施肥处理 ,研究了化肥、有机肥及其配合施用对杂草种类、密度和生长量的影响。结果表明 ,试验区内共有杂草 38种 ,各处理中均有发生的杂草有 9种 ,以 Om,Om+N处理的杂草种类最多 ,均为 2 3种 ;马兰、通泉草等 5种杂草密度较大 ,苍耳、刺儿菜等 19种杂草发生密度较低 ,以 Om处理的杂草密度最大 ;Om处理杂草鲜重值最高 ,杂草鲜重依 Om,Om+NP,Om+NPK,Om+N,NP,NPK的处理次序逐渐减轻 ,但在 1%显著水平上无差异 ,而与 CK,N2个处理存在差异。

Study on effects of N.P.K. fertilizer on weeds growing

Experiments including 8 treatments of CK,N,NP,NPK,Om,Om+N,Om+NP and Om+NPK nutrient were carried out to investigate effects of chemical fertilizer and organic fertilizer and their coordination on the species,density and growth of weed.The results indicated that:different treatment had different effect on weed growth;38 species of weed were found in experiment fields,different treatment had different weed species,but each had 9 species;the density of 5 weed species such as Kalimeris indica,Mazus japonicus was higher,the frequency of 19 weed species such as Xanthium sibiricum,Cephaianoplos segetum was lower,the fresh weed weight with organic fertilizer treatment was the highest,and it decreased gradually from Om,Om+NP,Om+NPK,Om+N,NP to NPK,the difference among these 6 treatments is not significant at 1% level,while significant between these 6 treatments and CK,N treatments;different treatment affected biology diversity.