^ШХР: *http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1445-6664 /issues (http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1445-6664/ issues)
^АВТ: Srivastava R.; Singh K.P.
^ЗГЛ: Diversity in weed seed production and the soil seed bank: Contrasting responses between two agroecosystems [Сравнительное исследование видового разнообразия и величины запаса семян сорняков в почве в богарных и орошаемых агроэкосистемах в условиях засушливого тропического климата. (Индия)]
^ВЫХ: Weed Biology & Management, 2014; Vol.14,N 1. - P. 21-30
^ДАТ: 2014
^ПРМ: Bibliogr.:p.29-30
+Реферат:

^РЕФ: This study was carried out to compare the diversity in seed production and the soil seed bank in a dryland and an irrigated agroecosystem in the dry tropics. Both agroecosystems showed a comparable number of species, but only 25% and 38% similarity during the winter and rainy cropping seasons, respectively. In the irrigated agroecosystem, the amount of seed production diversity was almost double in the winter season, compared to the rainy season. The weed seedbank diversity was low but was sensitive to cropping practices and seasons in both agroecosystems. A considerably smaller soil seedbank size in the irrigated agroecosystem (cf. dryland) was related to lowered weed seed production. The dryland agroecosystem showed a greater accumulation of the seeds of broad-leaved weeds, whereas the irrigated agroecosystem accumulated more seeds of the grasses or sedges. About three-fourths of the seeds during the winter season were accounted for by Anagallis arvensis and Chenopodium album in the dryland agroecosystem and by C. album and Melilotus indica in the irrigated agroecosystem. However, during the rainy season, Ammannia baccifera, Echinochloa colona and Cyperus rotundus dominated in both agroecosystems. The changes in the weed seed bank and its diversity are mainly attributed to differences in water management, which tends to reduce species diversity, especially at a lower depth, but leads to the dominance of some potentially noxious weeds (e.g. Phalaris minor and M. indica). Approximately double the soil seedbank size and a greater diversity at a lower depth might indicate an adaptive mechanism in the storage of weed seeds in the dryland agroecosystem. aref1

^TRN: 1646405
^ВИД: Статья из книги
^ЯЗК: Английский
+Индексирование:
^РУБ: 68_37_33_03
^УДК: 632.51
^ТЕР: СОРНЯКИ (Weeds). БОГАРНОЕ ЗЕМЛЕДЕЛИЕ (Rainfed farming). ОРОШЕНИЕ (Irrigation) [ИРРИГАЦИЯ]. СУХИЕ ТРОПИКИ. СЕМЕННАЯ ПРОДУКТИВНОСТЬ. ЗАПАС СЕМЯН В ПОЧВЕ (SEED BANKS). АГРОЭКОСИСТЕМЫ (Agroecosystems). ИНДИЯ (India).
^РТЗ: АЗИЯ (Asia). ГИДРОМЕЛИОРАЦИЯ. ЕВРАЗИЯ (Eurasia). ЗАСОРЕННОСТЬ. МЕЛИОРАЦИЯ [С-Х МЕЛИОРАЦИЯ]. ПРОДУКТИВНОСТЬ. СИСТЕМЫ ЗЕМЛЕДЕЛИЯ. СТРАНЫ БРИКС. СТРАНЫ МИРА. ТРОПИКИ (Tropics) [ТРОПИЧЕСКИЕ ПОЯСА]. ФИЗИКО-ГЕОГРАФИЧЕСКИЕ ЗОНЫ. ФИТОСАНИТАРНОЕ СОСТОЯНИЕ [САНИТАРНОЕ СОСТОЯНИЕ; САНИТАРНОЕ СОСТОЯНИЕ ЛЕСА И С-Х КУЛЬТУР]. ЭКОСИСТЕМЫ (Ecosystems). ЮЖНАЯ АЗИЯ (South Asia).

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