论文部分内容阅读
采用二次回归通用旋转组合设计 ,在辽西半干旱区进行了长期田间试验 ,研究灌水、施氮、施磷和施秸秆对土壤氮素含量的影响。结果表明 ,灌水在促进作物生长和提高产量的同时 ,使得土壤中的全氮和水解氮含量有所降低 ,施氮肥能够提高土壤中的氮素含量 ,土壤氮素含量随着磷肥施用量的增加先降低后增加 ,施秸秆能显著提高土壤氮素含量特别是水解氮含量。因此 ,秸秆施用是保持和提高土壤氮素营养的有效措施。
A quadratic regression general rotation combination design was used to conduct long-term field experiments in the semi-arid region of western Liaoning Province. The effects of irrigation, N application, phosphorus application and straw application on soil nitrogen content were studied. The results showed that irrigation promoted the growth of crops and increased yield, while decreased the content of total nitrogen and hydrolyzed nitrogen in soil. Nitrogen fertilizer increased the content of nitrogen in soil. With the increase of application amount of nitrogen fertilizer, First reduce and then increase, straw can significantly increase soil nitrogen content, especially hydrolyzed nitrogen content. Therefore, straw application is an effective measure to maintain and enhance soil nitrogen nutrition.