随着人们对农田环境重视程度的不断提升,农药包装废弃物的回收处置已经成为农村环境治理的重要内容之一.为建设美丽乡村,实现生活宜居、田园清洁的目标,本文就天津市西青区在农药包装废弃物回收处置工作中的主要做法和存在问题进行了总结分析,并提出了对策建议.

甾烯醇是一种新型的植物源抗病毒剂.本试验为研究甾烯醇对番茄病毒病的防治效果,选取了目前天津地区农户防治番茄病毒病常用的以宁南霉素、吗啉胍为主要成分的农药进行了田间药效对比试验.结果 表明,0.06％甾稀醇微乳剂对番茄病毒病的防治效果显著优于8％宁南霉素水剂和4.3％辛菌·吗啉胍水剂,3种药剂间隔7d连续喷施2次后,防效分别为62.32％,40.58％和35.50％.甾烯醇对环境友好,可在番茄的绿色生产中推广应用.

The contents of plant crude protein,crude fat,crude fiber and plant weight in different growth stage of Silag maize zhongbei 410 were analyzed.The results showed that the accumulation amounts of crude protein tended to reduce with plant growing development,while the content of crude fat increased and reached the maximal value in milk stage,then it reduced;the crude fiber content increased after milk stage.The change of plant weight was the same as crude fat.The most suitable harvesting period was milk stage as silage maize.

通过品种比较试验筛选出优质、高产、适应性强、抗逆性好的专用青贮玉米品种科多4号、科多8号和科青1号,及粮饲兼用型玉米品种中北410、粮饲4号、粮饲9号、东单60、津玉259,这些品种均适合在天津推广应用.