论文部分内容阅读
稻苗含氮量超过2.5％时,叶片才能正常伸长,但是其胚乳的含氮量往往低于1.68％,不能满足稻苗的生长需要。因此,进行尿素浸种,以便早期供氮,能显著促进稻苗的生长。尿素浸种在籼稻上的应用有良好效果,但是否适合于粳稻与糯稻,则未见报道。同时,对尿素浸种的最适浓度与中毒极限还未明确,为了进一步掌握尿素浸种技术,向广大农户进行示范推广,我们研究了不同浓度的尿素浸种对4个水稻品种(分别代表籼、粳、糯类型)秧苗生长的影响。供试品种是晚粳32-78、中粳盐粳2号,籼稻原丰早,糯稻紫金糯。
When the nitrogen content of rice seedlings exceeds 2.5%, the leaves can elongate normally, but the nitrogen content of their endosperm is often less than 1.68%, which can not meet the growth needs of rice seedlings. Therefore, soaking urea for early nitrogen supply can significantly promote the growth of rice seedlings. Urea seed soaking in indica rice application has good effect, but whether it is suitable for japonica rice and glutinous rice, have not been reported. At the same time, the optimal concentration of soaking urea and the limit of poisoning are not yet clear. In order to further grasp the technique of urea soaking and demonstrate it to a large number of farmers, we studied the effect of different concentrations of urea soaking on four rice varieties (indica, japonica, Waxy type) seedling growth. The tested cultivars were late japonica 32-78, middle japonica salt Japonica 2, indica raw abundant morning, glutinous rice Zijinnuo.