scholarly journals Weed Seed Rain Dynamics and Ecological Control Ability in Agrophytocenosis

10.5772/55972 ◽  
2013 ◽  
Author(s):  
Vytautas Pilipaviius
Keyword(s):  
Seed Rain ◽  
Weed Seed ◽  
Ecological Control

Weed seed rain, soil seedbanks, and seedling recruitment in no-tillage crop rotations

Weed Science ◽  
2003 ◽  
Vol 51 (4) ◽  
pp. 569-575 ◽  
Author(s):  
Theodore M. Webster ◽  
John Cardina ◽  
Anthony D. White
Keyword(s):  
Seedling Recruitment ◽  
Seed Rain ◽  
Crop Rotations ◽  
No Tillage ◽  
Weed Seed

Reducing Weed Seed Rain with Late-Season Glyphosate Applications

2007 ◽  
Vol 21 (3) ◽  
pp. 753-758 ◽  
Author(s):  
Chad E. Brewer ◽  
Lawrence R. Oliver
Keyword(s):  
Seed Rain ◽  
Weed Seed ◽  
Late Season

Influence of fallow type and land-use intensity on weed seed rain in a forest/savanna transition zone

Weed Science ◽  
2000 ◽  
Vol 48 (5) ◽  
pp. 604-612 ◽  
Author(s):  
Friday Ekeleme ◽  
I. Okezie Akobundu ◽  
Augustine O. Isichei ◽  
David Chikoye
Keyword(s):  
Land Use ◽  
Transition Zone ◽  
Seed Rain ◽  
Land Use Intensity ◽  
Weed Seed

Weed Seed Pools Concurrent with Corn and Soybean Harvest in Illinois

Weed Science ◽  
2008 ◽  
Vol 56 (4) ◽  
pp. 503-508 ◽  
Author(s):  
Adam S. Davis
Keyword(s):  
Seed Bank ◽  
Soil Seed Bank ◽  
Soil Surface ◽  
Seed Rain ◽  
Weed Seed ◽  
Weed Species ◽  
East Central ◽  
Giant Foxtail ◽  
Central Illinois ◽  
Prickly Sida

At the time of grain harvest, weed seeds can be classed into one of four pools on the basis of dispersal status and location: (1) undispersed, remaining on the mother plant; (2) dispersed in the current year, on the soil surface; (3) dispersed in the current year and collected by harvest machinery; and (4) dispersed in a previous year and persisting within the soil seed bank. Knowledge of the relative sizes of these seed pools for different weed species under different crop environments will be useful for determining the best way to reduce the size of inputs to the soil seed bank. In fall 2004 and fall 2005, four randomly selected commercially managed corn and soybean fields in east-central Illinois were sampled to quantify weed seed pools at time of crop harvest. Thirty randomly located 0.125-m2quadrats were placed within each field, the four seed pools mentioned above were sampled for each quadrat, and the species composition and abundance of each seed pool was determined. The magnitude of the weed seed rain varied among species and between years and crops. Twenty-six weed species were found to contribute to at least one of the four seed pools. However, the weed seed pools were consistently dominated by six species: velvetleaf,Amaranthuscomplex (redroot pigweed and waterhemp), ivyleaf morningglory, giant foxtail, prickly sida, and common cocklebur. For each of these species, the ratio of undispersed seeds to seeds in the soil seed bank at harvest time was ≥ 1 in at least one crop during one of the two experimental years, indicating a potential for the soil seed bank to be completely replenished or augmented by that year's seed rain. This analysis demonstrates the urgent need for techniques to limit weed seed inputs to the soil seed bank at the end of the growing season.

Weed seed rain interception by grass cover depends on seed traits

Weed Research ◽  
2014 ◽  
Vol 54 (6) ◽  
pp. 593-602 ◽  
Author(s):  
D Doisy ◽  
N Colbach ◽  
J Roger-Estrade ◽  
S Médiène
Keyword(s):  
Seed Rain ◽  
Grass Cover ◽  
Seed Traits ◽  
Weed Seed ◽  
Rain Interception

DEVELOPMENT OF INTEGRATED MONITORING NETWORK FOR MEASURING SALINITY OF SEA WATER

2018 ◽  
pp. 18-26
Author(s):  
Sima Ajdar qizi Askerova
Keyword(s):  
Surface Waters ◽  
Sea Water ◽  
Water Environment ◽  
Monitoring Network ◽  
Monitoring Networks ◽  
The Caspian Sea ◽  
Integrated Monitoring ◽  
Ecological Control ◽  
Different Depths ◽  
Optimal Construction

Monitoring of sea water condition is one of major requirements for carrying out the reliable ecological control of water environment. Monitoring networks contain such elements as sea buoys, beacons, etc. and are designated for measuringvarious hydrophysical parameters, including salinity of sea water. Development of specialized network and a separate buoy system for measuring thesea water salinity at different depths makes it possible to determine major regularities of processes of pollution and self-recovery of the sea waters. The article describes the scientific and methodological basics for development of this specialized network and questions of its optimal construction. It is well-known that at a depth of 30-45 m of the Caspian Sea salinity decreases and then at a depth of 45-60 m salinity is fully recovered. The mentioned changes of salinity at the relatively upper layer of sea waters is of special interest for studying the effect of ocean-going processes on the climate forming in the Caspian area. In terms of informativeness of measurements of surface waters salinity, the most informative is a layer ata 30-60 m depth, where inversion and recovery of salinity take place. It is shown that in most informative subrange of measurements, i. e. at a depth of 30-60 m optimization of regime of measurements complex should be carried out in order to increase the effectiveness of held researches. It is shown that at a depth of 35-50 m choice of the optimum regime of measurements makes it possible to obtain the maximum amount of information.

Effect of hypoxia on buried weed seed germination

Weed Research ◽  
1995 ◽  
Vol 35 (5) ◽  
pp. 343-351 ◽  
Author(s):  
S. BENVENUTI ◽  
M. MACCHIA
Keyword(s):  
Seed Germination ◽  
Weed Seed
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