2篇
您的检索式：作者名="Merle F. VIGIL"
|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Cover Crop and Irrigation Effects on Soil Microbial Communities and Enzymes in Semiarid Agroecosystems of the Central Great Plains of North America显示文摘盖子庄稼能由增加碳(C) 供应在土壤微生物学上有有益的效果,但是这些有益的效果能被降水条件调制。这研究的目的是比较休闲冬季小麦(Triticum aestivum L.) 旋转到在在半干旱的美国高平原的 rainfed 和灌溉条件下面的几盖子庄稼冬季小麦旋转。实验在科罗拉多在二个地点,在内布拉斯加的 Sidney,和 Akron 被执行,美国与三次在在盖子庄稼结束的 2012-2013 的土壤采样,种的小麦,和小麦成熟。实验包括了四单个种类的盖子庄稼, 10 种类混合物,和一个休闲处理。测量的变量是土壤 C 和氮(N) ,由甲基酉旨(名声) 介绍的丰满的酸的土壤社区结构,和土壤 -glucosidase,-glucosaminidase, 和 phosphodiesterase 活动。休闲处理,缺乏生活植物,在盖子庄稼结束减少了大多数名声的集中。全部的名声集中与盖子庄稼生物资源被相关(R = 0.62 在 Sidney 并且 0.44 在 Akron ) 。等到种的小麦,有灌溉的有益的效果,它在 mycorrhizal 和原生动物门标记引起了增加。在小麦成熟,土壤名声上的盖子庄稼和灌溉效果减退了,但是灌溉在 Akron 在 -glucosidase 和 phosphodiesterase 活动上有积极效果,它二个地点中是更干燥的。盖子庄稼和灌溉是慢的影响土壤 C 集中。我们的结果证明盖子庄稼在在半干旱的基于小麦的旋转和灌溉的微生物引起的社区能提高的土壤上有短命效果土壤酶活动。在半干旱的环境,更长的时间跨度可能被需要在土壤上看见盖子庄稼的有益的效果微生物引起的社区结构,土壤酶活动,和土壤 C 隐遁。 | Francisco J. CALDERON David NIELSEN Veronica ACOSTA-MARTINEZ Merle F. VIGIL Drew LYON | 2016 | Pedosphere2016，26，2： | 3 |
| 2 | Compost Input Effect on Dryland Wheat and Forage Yields and Soil Quality显示文摘Organic agricultural systems rely on organic amendments to achieve crop fertility requirements, and weed control must be achieved without synthetic herbicides. Our objective was to determine the crop yield and soil quality as affected by a transition from grass to dryland organic agriculture in the Central Great Plains of North America. This study evaluated three beef feedlot compost(BFC)treatments in 2010–2015 following biennial application rates: 0(control), 22.9, and 108.7 t ha^(-1) on two dryland organic cropping systems: a wheat(Triticum aestivum)-fallow(WF) rotation harvested for grain and a triticale(Triticosecale)/pea(Pisum sativum)-fallow(T/P-F) rotation harvested for forage. The triticale + pea biomass responded positively to the 108.7-t ha^(-1) BFC treatment,but not the 22.9-t ha^(-1) BFC treatment. The wheat biomass was not affected by BFC addition, but biomass N content increased.Beef feedlot compost input did not increase wheat grain yields, but had a positive effect on wheat grain Zn content. Soil total C and N contents increased with the rate of 108.7 t ha^(-1) BFC after three applications, but not with 22.9 t ha^(-1) BFC. Soil enzyme activities associated with N and C cycling responded positively to the 108.7-t ha^(-1) BFC treatment. Saturated salts were high in the soil receiving 108.7 t ha^(-1) of BFC, but did not affect crop yields. These results showed that BFC was effective in enhancing forage yields, wheat grain quality, and soil C and N, as well as specific microbial enzymes important for nutrient cycling. However, the large rates of BFC necessary to elicit these positive responses did not increase grain yields, and resulted in an excessive buildup of soil P. | Francisco J. CALDERON Merle F. VIGIL Joseph BENJAMIN | 2018 | Pedosphere2018，28，3： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员