^АВТ: Cauwer B. de; D'Hose T.; Cougnon M.; Leroy B.
; Bulcke R.;
^ЗГЛ: Impact of the quality of organic amendments on size and
composition of the weed seed bank [Влияние качества
органических удобрений на видовой состав и величину запаса
семян сорняков в почве под с.-х. посевами]
^ВЫХ: Weed Research, 2011; Vol.51,N 3. - P. 250-260
^РЕФ: In addition to improving the soil quality, organic amendments of soils may affect weed seed survival, emergence, growth and reproduction. This study evaluated the effects of applications of different qualities of organic amendments on size and composition of the weed seed bank in a field under sequential cropping over 4 years. Fertilisation systems tested included farmyard manure, vegetable fruit and garden waste compost, two types of farm compost differing in carbon:nitrogen (C:N) ratio, cattle slurry and mineral fertiliser. All organically amended plots received equal amounts of C. Crop growth was equalised on all plots by applying supplemental mineral N. Seed bank sampling took place in May 2009 to a depth of 10 cm. The weed seed bank was analysed using the seedling emergence method. Despite equal crop growth in fertilised plots, total seed bank density was lowest in plots amended with compost with low C:N ratio and highest in slurry-amended plots. Observed differences in seed bank densities reflected differences in soil organic carbon content and microbial biomass. At plot level, hard-coated seeds in the seed bank (e.g. Chenopodium spp.) were inversely related to soil microbial activity. Observed differential responses of species to applied fertilisers might be attributed to interspecific differences in resistance against microbial seed degradation. Compost-based fertilisation systems could be sustainable tools for incorporation into integrated weed control strategies aiming at depleting the weed seed bank.
^ВИД: Статья из книги
^РУБ: 68_37_33_03; 68_37_33_13_15
^УДК: 632.51; 632.931.1:631.8
^ТЕР: СОРНЯКИ (Weeds). ЗАПАС СЕМЯН В ПОЧВЕ (SEED BANKS).
ВИДОВОЙ СОСТАВ. ОРГАНИЧЕСКИЕ УДОБРЕНИЯ (Organic
fertilizers). КОМПОСТЫ (Composts) [БИОГУМУС]. НАВОЗ.
НАВОЗНАЯ ЖИЖА (Slurry). МИНЕРАЛЬНЫЕ УДОБРЕНИЯ (inorganic
fertilizers; Mineral fertilizers).
^РТЗ: БИОГЕОЦЕНОЗЫ. БИОСФЕРА. БИОЦЕНОЗЫ (Biocoenosis).
ЗАСОРЕННОСТЬ. СТРУКТУРА СООБЩЕСТВ. УДОБРЕНИЯ
(Fertilizers). ФИТОСАНИТАРНОЕ СОСТОЯНИЕ [САНИТАРНОЕ
СОСТОЯНИЕ; САНИТАРНОЕ СОСТОЯНИЕ ЛЕСА И С-Х КУЛЬТУР].