埃塞俄比亚提格雷地区耕作频率、播种率和草甘膦施用对聚四氟乙烯和杂草的影响

IF 1.6 4区农林科学 Q1 Agricultural and Biological Sciences

Experimental Agriculture Pub Date : 2022-09-05 DOI:10.1017/S001447972200028X

Haftamu Gebretsadik Gebrehiwot, J. Aune, O. Eklo, T. Torp, L. Brandsæter

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引用次数: 0

摘要

总结2015年和2016年进行了田间试验，研究了耕作频率、种子率和草甘膦对聚四氟乙烯和杂草的影响。试验采用分块设计，三次重复，以耕作频率（常规、最低和免耕）为主要地块，种子率（5、15和25 kg ha−1）和草甘膦（有和无）组合为次要地块。结果表明，免耕使聚四氟乙烯生物量产量比少耕减少15%，比常规耕作减少26%。与传统耕作相比，免耕和少耕也分别使粮食产量下降21%和13%。与15和25 kg ha−1相比，将种子率降低到5 kg ha−2可使生物量产量分别降低22%和26%。与15和25 kg ha−1的播种率相比，它还使粮食产量降低了约21%。与免耕相比，常规耕作显著降低了杂草密度、干重和覆盖率，分别降低了19%、29%和33%。与最低种子率相比，最高种子率显著降低了总杂草密度、干重和覆盖率，分别降低了18%、19%和15%。草甘膦不影响杂草密度，但使杂草干重减少14%，覆盖率减少15%。一般来说，采用最少耕作结合草甘膦施用和15 kg ha−1的播种率播种聚四氟乙烯，可以提高生产力，并将杂草影响降至最低。

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Effect of tillage frequency, seed rate, and glyphosate application on teff and weeds in Tigray, Ethiopia

Summary Field experiments were conducted in 2015 and 2016 to study the effect of tillage frequency, seed rate, and glyphosate on teff and weeds. The experiments were arranged in a split plot design with three replications consisting of tillage frequency (conventional, minimum, and zero tillage) as the main plot and the combination of seed rate (5, 15, and 25 kg ha−1) and glyphosate (with and without) as subplots. Results showed that zero tillage reduced teff biomass yield by 15% compared to minimum tillage and by 26% compared to conventional tillage. Zero tillage and minimum tillage also diminished grain yield by 21% and 13%, respectively, compared to conventional tillage. Lowering the seed rate to 5 kg ha−1 reduced biomass yield by 22% and 26% compared to 15 and 25 kg ha−1, respectively. It also reduced the grain yield by around 21% compared to 15 and 25 kg ha−1 seed rates. Conventional tillage significantly diminished weed density, dry weight, and cover by 19%, 29%, and 33%, respectively, compared to zero tillage. The highest seed rate significantly reduced total weed density, dry weight, and cover by 18%, 19%, and 15%, respectively, compared to the lowest seed rate. Glyphosate did not affect weed density but reduced weed dry weight by 14% and cover by 15%. Generally, sowing teff using minimum tillage combined with glyphosate application and seed rate of 15 kg ha−1 enhanced its productivity and minimized weed effects.

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来源期刊

Experimental Agriculture 农林科学-农艺学

CiteScore

2.50

自引率

6.20%

发文量

审稿时长

24 months

期刊介绍： With a focus on the tropical and sub-tropical regions of the world, Experimental Agriculture publishes the results of original research on field, plantation and herbage crops grown for food or feed, or for industrial purposes, and on farming systems, including livestock and people. It reports experimental work designed to explain how crops respond to the environment in biological and physical terms, and on the social and economic issues that may influence the uptake of the results of research by policy makers and farmers, including the role of institutions and partnerships in delivering impact. The journal also publishes accounts and critical discussions of new quantitative and qualitative methods in agricultural and ecosystems research, and of contemporary issues arising in countries where agricultural production needs to develop rapidly. There is a regular book review section and occasional, often invited, reviews of research.