维普期刊资源整合服务平台（V6.5）

维普中文期刊产品整合服务

1篇 您的检索式：作者名="Davidmark J"

选中清除导出查看参考文献查看引证文献引用追踪共1页首页上一页第1页下一页末页 /1 跳转

		题名	作者	年代	出处	被引量
	1	Effect of γ-PGA Coated Urea on N-Release Rate and Tomato Growth显示文摘The anionic polymer γ-polyglutamic acid(γ-PGA) was used to coat urea and slow its dissolution. Three types of slow release urea(SRU) fertilizers(polymer coated urea with pore constriction, polymer coated urea with enzyme inhibitor and polymer coated urea with pore constriction and enzyme inhibitor) were prepared and tested for the N-release rate. After using SRU, the effect on the tomato growth was analyzed. The extracts of SRU were analyzed for NH3/NH4+-N and NO3--N. The N-release rate was used to determine the optimum ratio of ingredients. The results show that the three types of SRU met the dissolution rate standards recommended by the Committee of European Normalization. γ-PGA SRU increased the chlorophyll content of tomato(flowering stage) by an average of 100% compared with that grew in untreated urea. The results from soil analysis(0-60 cm in tomato pots) indicate that the content of NH3/NH4+-N in SRU-treated pots was 25%-61% higher than that in soil from urea-treated pots during the growing period,while the content of NO3--N was nearly 50% lower after the tomato had been harvested. Newly formulated SRU fertilizer increases nitrogen uptake and reduces loss of applied nitrogen. Plant growth is enhanced, a valuable resource is conserved, and the aquatic environment benefits from decreased level of nitrate in agricultural run-off.	JIANG Yue LIU Liming LUO Guangfu ZHANG Zhanli Davidmark J HUANG Yingping	2014	Wuhan University Journal of Natural Sciences2014，19，4：	2

返回顶部每页显示：

共1页首页上一页第1页下一页末页 /1 跳转

goolge学术搜索-维普

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1　渝公网安备 50019002500403号　违法和不良信息举报中心

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费