【摘要】 采用小区试验的方法,研究不同质量浓度(0.27、0.2、0.14、0.09、0.05、0.02mg/L)含砷水灌溉对土壤的pH值、有机质、全氮、速效磷、速效钾以及土壤砷质量分数和稻米的长势、产量及品质的影响。结果表明,砷水浓度与土壤速效磷、速效钾质量分数呈显著负相关关系,与土壤全氮质量分数呈极显著负相关关系,与土壤砷质量分数呈极显著正相关关系。在灌溉水量相同的情况下,最大砷水浓度灌溉时,土壤氮、磷、钾质量分数相比于原始土分别降低了57.83%、85.85%、55.85%;土壤砷质量分数相比于原始土增加了70.33%。在低浓度范围内,砷水灌溉对于水稻的长势、产量及品质均有一定程度的抑制作用,但差异不显著。更多还原

【Abstract】 Plot experiments are conducted to do research on the effect of different concentrations(0.27,0.2,0.14,0.09,0.05,0.02mg/kg)of arsenic in rice irrigation water on soil pH,organic matter,total nitrogen,available phosphorus,K and arsenic content,yield and quality of rice.The results show that,the concentration of arsenic in water is significantly negatively correlated with the content of P and K in soil,and is extremely negatively correlated with the total nitrogen content.And it was extremely positively correlated with the arsenic content in soil.Under the same circumstances of irrigation water,when the content of arsenic in the water is at the maximum concentration,the content of N,P,K in soil while the original soil decreases by 57.83%,85.85%,55.85%.In the range of the low concentration,Arsenic stress causes the inhibition of the growth,yield and quality of rice,but the difference is not significant.更多还原