Wang Dehan, Peng Junjie, Lin Huidong, Liao Zongwen
Department of Environmental Science and Engineering, South China Agricultural University, Guangzhou 510642, China.
Huan Jing Ke Xue. 2003 Sep;24(5):141-5.
Indoor cultivation experiment and plot field experiment were conducted to study the effect of lignosulfonates on urea nitrogen transformation in soil and the mechanism of controlling nitrate pollution in vegetable. Results showed that lignosulfonates behaved inhibition effect on urea hydrolysis compared with the contrast treatment, the contents of remainder urea nitrogen treated with lignosulfonates was more than that of another kind of urease inhibitor hydroquinone in soil after 69 hours' cultivation. Lignosulfonates could reduce contents of nitrate in cabbage, it as well increase contents of vitamin C in a large degree, enhance the nitrate reductase activity, then accelerated nitrogen assimilation in plants. The urease activity was lower and contents of ammonium nitrogen in soil was larger after ingathering, lignosulfonates could keep nitrogen release slowly, and could be used as a kind of effective inhibitor to nitrogen fertilizer in the controlled-release fertilizers.
通过室内培养试验和田间小区试验，研究了木质素磺酸盐对土壤中尿素氮转化的影响以及控制蔬菜硝酸盐污染的机制。结果表明，与对照处理相比，木质素磺酸盐对尿素水解有抑制作用，培养69小时后，土壤中木质素磺酸盐处理的剩余尿素氮含量高于另一种脲酶抑制剂对苯二酚处理的剩余尿素氮含量。木质素磺酸盐可以降低甘蓝中的硝酸盐含量，还能在很大程度上提高维生素C含量，增强硝酸还原酶活性，从而加速植物体内的氮同化。收获后土壤脲酶活性较低，铵态氮含量较高，木质素磺酸盐能使氮缓慢释放，可作为控释肥料中氮肥的一种有效抑制剂。
