scholarly journals Weed seed-bank responses to long-term fertilization in a rice-wheat rotation system

2014 ◽  
Vol 60 (No. 8) ◽  
pp. 344-350 ◽  
Author(s):  
M. Jiang ◽  
Shen XP ◽  
W. Gao ◽  
Shen MX ◽  
Dai QG
Keyword(s):  
Seed Bank ◽  
Surface Soil ◽  
Soil Nutrient ◽  
Organic Fertilizers ◽  
Weed Seed ◽  
Factors Affecting ◽  
Fertilization Experiment ◽  
Rotation System ◽  
Major Nutrients

We studied the heterogeneity of soil weed seed-bank in a rice-wheat rotation system after long-term application of different organic or non-organic fertilizers, and the effects of major nutrients on the characteristics of the weed seed-bank. The soil was sampled in the Taihu area after a 31-year long-term fertilization experiment. Weed seeds were identified and counted in the surface soil of 12 differentially treated areas using microscopic examination, and analyzed by the Simpson, Shannon, Margalef, and Pielou indexes. The long-term application of organic fertilizers could significantly reduce the density of soil weed seed-bank; non-organic fertilizers and a combination of non-organic and organic fertilizers had a significant influence on the number of species and diversity of weeds. The application of organic fertilizers improved the Simpson, Shannon and Pielou indexes of soil weed seed-bank community and stabilized the community structure. In terms of the soil nutrient system itself, the soil organic materials and total nitrogen content are the main environmental factors affecting the distribution of soil weed seed-bank.

scholarly journals Effects of long-term fertilization treatments on the weed seed bank in a wheat-soybean rotation system

2020 ◽  
Vol 21 ◽  
pp. e00870 ◽  
Author(s):  
Junfeng Pan ◽  
LiGan Zhang ◽  
Li Wang ◽  
Songling Fu
Keyword(s):  
Seed Bank ◽  
Weed Seed ◽  
Rotation System

Weed seed bank diversity and community shift in a four-decade-old fertilization experiment in rice–rice system

2016 ◽  
Vol 86 ◽  
pp. 135-145 ◽  
Author(s):  
B. Lal ◽  
Priyanka Gautam ◽  
R. Raja ◽  
R. Tripathi ◽  
M. Shahid ◽  
...  
Keyword(s):  
Seed Bank ◽  
Weed Seed ◽  
Fertilization Experiment ◽  
Community Shift

Influence of long-term different fertilization on soil weed seed bank diversity of a paddy soil under rice/rape rotation

2008 ◽  
Vol 3 (3) ◽  
pp. 320-327 ◽  
Author(s):  
Wei Feng ◽  
Genxing Pan ◽  
Sheng Qiang ◽  
Ruhai Li ◽  
Jiguang Wei
Keyword(s):  
Seed Bank ◽  
Paddy Soil ◽  
Weed Seed

scholarly journals Effect of 26 Years of Intensively ManagedCarya cathayensisStands on Soil Organic Carbon and Fertility

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Jiasen Wu ◽  
Jianqin Huang ◽  
Dan Liu ◽  
Jianwu Li ◽  
Jinchi Zhang ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Soil Fertility ◽  
Ph Value ◽  
Organic Fertilizers ◽  
Intensive Management ◽  
Active Organic Matter ◽  
Carya Cathayensis ◽  
Major Nutrients

Chinese hickory (Carya cathayensis), a popular nut food tree species, is mainly distributed in southeastern China. A field study was carried out to investigate the effect of long-term intensive management on fertility of soils under aC.cathayensisforest. Results showed that after 26 years’ intensive management, the soil organic carbon (SOC) content of the A and B horizons reduced by 19% and 14%, respectively. The reduced components of SOC are mainly the alkyl C and O-alkyl C, whereas the aromatic C and carbonyl C remain unchanged. The reduction of active organic matter could result in degradation of soil fertility. The pH value of soil in the A horizon had dropped by 0.7 units on average. The concentrations of the major nutrients also showed a decreasing trend. On average the concentrations of total nitrogen (N), phosphorus (P), and potassium (K) of tested soils dropped by 21.8%, 7.6%, and 13.6%, respectively, in the A horizon. To sustain the soil fertility andC.cathayensisproduction, it is recommended that more organic fertilizers (manures) should be used together with chemical fertilizers. Lime should also be applied to reduce soil acidity.

scholarly journals The Influence of Long-Term Different Crop Rotations and Monoculture on Weed Prevalence and Weed Seed Content in the Soil

Agronomy ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1367
Author(s):  
Lina Marija Butkevičienė ◽  
Lina Skinulienė ◽  
Ingė Auželienė ◽  
Vaclovas Bogužas ◽  
Rita Pupalienė ◽  
...  
Keyword(s):  
Crop Rotation ◽  
Seed Bank ◽  
Field Experiments ◽  
Crop Rotations ◽  
Winter Rye ◽  
Weed Seed ◽  
Row Crops ◽  
Weed Density ◽  
Intensive Farming

Equally effective way to achieve sustainable farming and the challenge set by the European Commission on 20 May 2020: proper crop rotation and thus reduction of the quantity of on-farm chemicals. Long-term stationary field experiments were established in 1966 at Vytautas Magnus University Experimental Station (54°53′ N, 23°50′ E). The study was conducted with intensive, three-course, field rotation with row crops, for green manure crop rotations, and rye monoculture as well during the last 5-year period of a 50-year investigation to determine the effect of crop rotation combinations and rye monoculture on weed density and seed bank and grain yield. In cereal crops, weed counting was performed twice: weed density was determined before the application of herbicides, and weed counting was done before the harvest. Weed seedlings were counted, their botanical species were determined, annual and perennial weed number was estimated. Weed seed bank was established before primary tillage in soil. The results obtained confirmed the hypothesis that with climate change and intensive farming, long-term crop rotations are likely to increase crop productivity, reduce weeds and weed seed banks in the soil, and thus contribute to maintaining agroecosystem sustainability. The winter rye 1000 grain weight and yield decreases as weed mass increases showing strong negative correlations: y = 475.56 − 11.93x, r = −0.91, p ≤ 0.05; y = 82.97 −14.82x, r = −0.97, p ≤ 0.01. Reseeding of rye crops leads to a growing prevalence of weeds such as Equisetum arvense L. and Mentha arvensis. Crop structures these days are dominated by cereals, which inevitably increase the spread of weeds, and therefore, the importance of crop rotations increases in the context of intensive farming.

Weed seed bank dynamics responses to long‐term chemical control in a rice–wheat cropping system

2020 ◽  
Vol 76 (6) ◽  
pp. 1993-2003
Author(s):  
Pinglei Gao ◽  
Zheng Zhang ◽  
Junming Shen ◽  
Yuxiang Mao ◽  
Shouhui Wei ◽  
...  
Keyword(s):  
Seed Bank ◽  
Chemical Control ◽  
Cropping System ◽  
Weed Seed ◽  
Seed Bank Dynamics

scholarly journals Long‐term farming systems and last crop sown shape the species and functional composition of the arable weed seed bank

2020 ◽  
Vol 23 (3) ◽  
pp. 428-440
Author(s):  
Roser Rotchés‐Ribalta ◽  
Francesc Xavier Sans ◽  
Jochen Mayer ◽  
Paul Mäder
Keyword(s):  
Seed Bank ◽  
Farming Systems ◽  
Functional Composition ◽  
Weed Seed ◽  
Arable Weed

A Comparison of Threshold Strategies in Tomatoes and Soybean

2008 ◽  
Vol 22 (4) ◽  
pp. 729-735 ◽  
Author(s):  
Carlos D. Mayén ◽  
Kevin D. Gibson ◽  
Stephen C. Weller
Keyword(s):  
Weed Control ◽  
Seed Bank ◽  
Crop Yields ◽  
Control Strategies ◽  
Seed Banks ◽  
Weed Seed ◽  
Tomato Seed ◽  
Giant Foxtail ◽  
The Difference

Weed control strategies based on conserving crop yields rather than preventing weed seed production may result in increased weed densities and management costs over the long-term, particularly in less competitive crops such as tomatoes. The effect of crop, tillage, and duration of weed control on weed seed bank size and composition was examined from spring 2001 to spring 2003 near Lafayette, IN. Main plots in 2001 and 2002 contained soybean or tomato planted in rotation (soybean-tomato, tomato-soybean). Subplots were managed with either conventional or no-till practices. Sub-subplots contrasted threshold strategies in which weeds were either controlled for four to six weeks (period threshold, PT) or throughout the growing season (no-seed-threshold, NST). Seed banks were sampled annually in the spring. Emergent weeds were counted` at four and twelve weeks after planting (WAP) in 2001 and 2002. Weed seed banks did not significantly change in the NST plots in any year. However, seed bank densities increased substantially following tomatoes in PT plots. In contrast, weed seed bank densities decreased following soybeans in PT plots. The difference in seed banks and emergent weeds between soybean and tomatoes could be attributed primarily to greater suppression of giant foxtail by the soybean canopy. Giant foxtail control was greater in PT soybeans than in PT tomatoes in both years and giant foxtail comprised most of the PT tomato seed bank in 2002 and 2003. Tillage did not affect weed seed banks in any year. This study highlights the need to control later emerging weeds in tomatoes to prevent large increases in the weed seed bank.

Factors affecting the development of neoaortic root dilatation in the long-term period after the arterial switching operation

2019 ◽  
Vol 16 (2) ◽  
pp. 95-101
Author(s):  
L.A. Boсkeria ◽  
I.E. Nefedova ◽  
D.O. Berishvili ◽  
I.Yu. Baryshnikova
Keyword(s):  
Switching Operation ◽  
Factors Affecting
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