新疆主要污灌区养分资源特征的研究

Study on the Resource of Nutrients in Sewage Irrigated Soil of Xin Jiang

通过对新疆七个主要污灌地区养分含量的研究表明污灌区钾含量丰富,氮素含量不足,磷缺乏。库尔勒地区污灌时间最长,养分含量丰富;昌吉地区养分含量属中等水平,其它地区都有不同程度的养分缺乏状况。与新疆土壤普查资料对比,污灌后,土壤的C/N比差异不大9.86—13.85;供磷强度有所改善,均>1%;但供氮及供钾能力并没有显著改善,部分地区的供肥强度极低。相关性研究分析表明,土壤中大部分养分含量与有机质含量呈现极显著或显著相关,只有全钾与之无相关性;其它养分之间也存在相关性,但是部分养分之间的相关性是由于有机质含量干扰所致。

Base on the study of nutrients concentration in sewage irrigated soil in Xinjiang, the results showed that K concentration was abundance, N concentration was not enough and P concentration was lack. There were plentiful nutrients in Kuerle area due to the longest time of sewage irrigation. And the nutrients concentration of Changji area attributed medium level. Other areas were short of some nutrients. Comparing with the second Chinese Soil General Survey, after sewage irrigated, C/N was 9.86 - 13.85 ; supply capacities of P had an improvement and was more than 1% ; but supply capacities of N and K had no change, and supply capacities of fertilizer were too low in some areas. Correlation analysis illustrated that O. M had prominent relationship with mass nutrients in soil except total K. There are relationships among other nutrients, but some relationships because of O. M content.