氮、磷、钾三大元素是植物生长所需的重要营养元素,在水稻生产过程中,三大元素不同用量和比例均直接影响其产量和品质.为进一步推广水稻测土配方施肥技术,尤其是了解江南地区水稻施肥规律,探索氮、磷、钾三大元素分别在水稻产量形成中的作用和对水稻生物学特性、产量构成的影响,提高肥料利用率,开展本试验.

[Objective] To study effects on reduced base application of potash fertilizer of middle-season rice in wheat straw returning, in order to provide scientific basis for reducing potash fertilizer application of middle-season rice.[Method] The largest reduced application of potash used as basal fertilizer of middle-season rice was studied in the case of wheat straw completely returning.[Result] In the case of wheat straw returning and base application of potash fertilizer reduced by 20%⑤,the yield of middle-season rice,potassium absorptive amount,potassium utilization rate of potassium and potash fertilizer were the highest.The rice yield and potassium absorptive amount were 9 806.5,265.0 kg/hm2 respectively,which were 388.7 kg/hm2 (4.1%) and 45.5 kg/hm2 (20.7%) higher than the treatment of complete application of potash fertilizer ②.And the potassium utilization rate of potassium and potash fertilizer were respectively 53.2% and 60.3%,which were 15.8% and 22.9% higher than the treatment of complete application of potash fertilizer ②.The largest reduced application of potash fertilizer was 21.7% of total application of potash fertilizer,which was 35.8 kg/hm2 by quadratic fitting.[Conclusion] Reasonable reduced application of potash fertilizer of middle-season rice had certain effect to increase rice yield in the case of wheat straw completely returning,and the nutrient releasing of wheat straw can partly reduce the application of potash fertilizer in different degree,greatly increase potassium absorptive amount,potassium utilization rate of potassium and potash fertilizer.

详细介绍了东至县尧渡镇推广水稻工厂化育秧机械插秧的一些经验与做法,包括科学选择示范平台与严格项目资金管理、强化育秧工厂硬件建设标准与严格考核育秧能力、强化技术服务与严守技术操作规程等内容,以供参考.

该文介绍了东至县尧渡镇早稻高产创建工作的做法与成效,分析了高产创建工作目前存在的一些问题,并提出了解决这些问题的对策建议.

随着人们生活水平的提高，对瓜萎籽保健作用的认识也逐渐加强，发展瓜萎产业前景广阔，有利于提高农民的经济收益。该文在分析东至县瓜萎生产现状、存在问题的基础上提出了瓜萎产业发展的对策建议，即在搞好品种引进、试验、示范的基础上，实行区域化种植、产业化经营、企业化管理、社会化服务，同时建立完善的产业化生产机制。

通过3年的培训实践及对2010年农业专业技术培训的情况调查,肯定了新型农民培训对提高东至县农民素质、促进农业增效和农民增效等方面的积极意义;针对培训中出现的问题,提出相应的建议,为今后扎实开展此项工作提供经验和改进的依据。

快捕净、草长灭对早熟禾都有较好的防除效果,而以快捕净防效更好。用10%快捕净EC 35 m l/667m2和45 m l/667m2,药后45 d对早熟禾的株防效分别达86.03%和90.27%。70%草长灭WP 200 g/667m2株防效为63.59%;药后60 d,10%快捕净EC 35 m l/667m2和45 m l/667m2对早熟禾的株防效分别达94.27%和97.13%,70%草长灭200 g/667m2为87.50%;药后60 d对早熟禾的鲜重防效依次为96.96%、98.34%和95.15%。在本试验条件下,快捕净对油菜安全,草长灭对油菜有轻微药害。

30%乐斯灵乳油应用于水稻上的试验结果表明对稻纵卷叶螟虫有很好的防治效果,安全无害,使用剂量以3000-3750m l/hm2为宜。

试验结果表明:8%高渗三唑磷微乳剂是一种很好的防治水稻二化螟的杀虫剂,安全无药害,其用量以1500-1800m l/hm2为宜。

水稻直播栽培方法的应用已经逐渐扩大。本文对目前我县主要采用的水直播方式的关键栽培管理技术进行了研究、介绍,为水稻生产实践提供技术指导。