除草腐脲防除抛栽、移栽稻田杂草试验

除草腐脲是通州市新华农药厂产品，根据水稻需肥规律以及田间杂草草相特点，将施肥技术与化学除草技术相结合，经特定的生产工艺，将高效优质水稻发棵肥腐脲与广谱、高效、经济、安全的苄丙草一次性稻田除草剂相结合，生产出集除草、促壮苗分蘖为一体的除草药肥，以达到一次施药既能肥田又能除草的双重功效，将施肥和施药两次独立的农业技术合二为一，具有省工节本和增产增效等优点。为了明确除草腐脲的除草壮苗效果、应用技术及其对水稻秧苗的安全性和增产效果，作者于1999~2001年在通州市纱场、金乐乡进行了除草腐脲防除抛秧、移栽稻田杂…     

12.5%苄嘧·丁大粒剂防除移栽水稻田杂草试验示范

大粒剂作为水稻田除草剂的一种新剂型,具有使用方便,节工省本等优点。12.5%苄嘧·丁大粒剂于水稻移栽后5d施药,可有效控制稗草、球花碱草等水稻田混生杂草的危害,其除草效果与常规药剂乙·苄可湿性粉剂相当,对移栽水稻的生长发育无不良影响,安全性较好。     

2.9%丁,扑,喹啉酸混剂防除水稻旱育苗秧田杂草

丁、朴、喹啉酸系丁草胺、扑草净、二氯喹啉酸的复配制剂。于１９９３年开始研制并对其除草效果，对秧苗的安全性进行了试验。结果表明每苗床（２０米＾２）用本品１００克在水稻旱育苗秧田芽前封闭对单子叶及双子叶杂草除除效果达８５％以上，并对水稻安全、经９４、９５、９６三年大面积试验，深受农民欢迎。     

早稻抛秧田一次性化学除草效果试验

本文介绍了应用３５％丁苄可湿性粉剂、５０％二氯喹啉酸加１０％苄嘧黄隆超微可湿性粉剂与泥土混和措施施对早稻抛秧田要草的防除效果，安全性和增产作用，试验结果表明，在水稻抛载后５天施丁苄１２０克１５０克以及抛栽后７天施二氯喹啉酸３０克加苄嘧共隆１５克对划稻抛秧田的主要杂草如稗草、异型莎草、鸭香草、节节苯和矮慈姑等均有显著的防效，其总体防治效果可分别达到９６．１％、９７．１％和９８．７％，且对水稻生长无不     

水稻直播田杂草防除技术试验研究

１９９４年对直播稻田进行了药剂除草研究。结果表明：播前用５％丁草胺颗粒剂１公斤／６６６．７米＾２，播后再用１０％苄嘧黄隆可湿性粉剂１５克／６６６．７米＾２处理，对稗草、阔叶草及总体杂草株防效分别为９４．６％、８７．３％９２．３％；鲜重防效分别达９９．４％、９２．８％、９９．３％。播后５天单用苄嘧黄隆１５克／６６６．７米＾２，对稗草、阔叶草、总体杂草株防效分别为８０．４％、６９．４％、７７．４％；鲜     

稻田除草剂的开发与使用

论述了新近稻田除草剂新品种及新的活性化合物及其应用前景。     

28%乙.嗪可湿性粉剂防除大豆田杂草

乙。嗪可湿性粉剂虽一次性大豆田除草剂。试验结果表明，亩用有效剂量６０克，除草效果达９０％以上，对大豆安全，扩大了杀草谱，可防除整个大豆生长期杂草。     

克莠灵防除大豆田阔叶杂草试验

１９９５年用克莠灵水剂防除大豆田阔叶杂草。阜南，含山两地试验结果表明，每公顷用１．５￣２．０公升克灵１５天株防效在９８．２￣９９．１％，鲜重防效９７．５￣９９．０％，克莠灵为大豆田理想的阔叶除草剂。     

烟稻轮作烟地化学除草的作用研究

经大面积、多点、多年的试验结果表明,烟稻轮作烟地用都尔或大惠利进行化学除草,其作用是多方面的,不仅除划效果比传统的人工中耕除草好,节省除草用工,而且使烟株根系发达、生长健壮,有利于烟地水土保持,减少肥料的消耗和流失,减少烟草丰的发生和危害,增加株高和叶片面积,提高烟叶品质和产量,投入与产出比为３２倍。     

A Four-Year Record of Methane Emissions from Irrigated Rice Fields in the Beijing Region of China

Methane (CH₄) emissions from irrigated rice fields were measured using an automatic sampling-measuring system with a closed chamber method in 1995–98. Average emission rates ranged from 11 to 364 mg m^–2 d^–1 depending on season, water regime, and fertilizer application. Crop management typical for this region (i.e., midseason drainage and organic/mineral fertilizer application) resulted in emission of 279 and 139 mg CH₄ m^–2 d^–1 in 1995 and 1997, respectively. This roughly corresponds to emissions observed in other rice-growing areas of China. Emissions were very intense during the tillering stage, which accounted for 85% of total annual emission, but these were suppressed by low temperature in the late stage of the season. The local irrigation practice of drying at mid-season reduced emission rates by 23%, as compared with continuous flooding. Further reduction of CH₄ emissions could be attained by (1) alternate flooding/drying, (2) shifting the drainage period to an earlier stage, or (3) splitting drainage into two phases (of which one is in an earlier stage). Emission rates were extremely sensitive to organic amendments: seasonal emissions from fields treated with pig manure were 15–35 times higher than those treated with ammonium sulfate in the corresponding season. On the basis of identical carbon inputs, CH₄ emission potential varied among organic amendments. Rice straw had higher emissions than cattle manure but lower emissions than pig manure. Use of cultivar Zhongzhuo (modern japonica) reduced CH₄ emission by 56% and 50%, in 1995 and 1997, respectively, as compared with Jingyou (japonica hybrid) and Zhonghua (tall japonica). The results give evidence that CH₄ emissions from rice fields in northern China can be reduced by a package of crop management options without affecting yields.     

17.2%苄.哌可湿性粉剂在直播稻田的应用

１７．２％苄．哌可湿性粉剂是近年推出的稻田复配除草剂新品种。通过药剂不同用量、时间试验结果，表明亩用２００－２５０克，在直接稻播后当天至５天内，对水３７．５公斤，喷雾处理，对杂草株、鲜重防效均达９０％以上，基本达到施药一次，控制草害。药剂对水稻安全，无药害产生，因而是目前直播稻田比较理想的除草剂新品种。     

吡虫啉与杀虫单混配防治水稻害虫试验

田间试验结果表明,１０％吡虫啉防治稻飞虱速效性较好,且高效持效。田间适宜药量为１０￣２０ｇ／６６７ｍ＾２,药后１￣５天,对稻飞虱校正防效达８４．６％￣９５．３％,极显著优于对照药剂２５％噻嗪酮２５ｇ／６６７ｍ＾２,防效（４４．５％￣８０．３％）。控效期达３０天以上。与８０％杀虫单４０ｇ／６６７ｍ＾２混配可有效防治稻纵卷叶螟,药后５天,校正防效达９２．４％￣９４．４％。在实行害虫兼治中,宜在稻虱若虫