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首页> 外文期刊>The Kasetsart Journal >Weed Seed Bank Response to Soil Depth, Tillage and Weed Management in the Mid Hill Ecology
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Weed Seed Bank Response to Soil Depth, Tillage and Weed Management in the Mid Hill Ecology

机译：中丘生态系统杂草种子库对土壤深度，耕作和杂草处理的响应

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The size and composition of weed seed bank was studied in the glass house based on the study initiated in the field under conventional and minimum tillage with five weed managements in wheat and dry direct seeded rice rotation at various soil depths such as 0-5 cm, 5-10 cm, 10-15 cm, and 15-20 cm. The experiments were conducted at Agronomy Farm, Khumaltar, Nepal during 2001-2003. The number of weed species was greater in weed seed bank than in the field. Eighty-one weed species belonging to 25 families were retrieved from the soil seed bank samples collected over three seasons. Dicot broadleaves ranked first in terms of number of species followed by grasses, sedges, monocot broadleaves and pteridophytes. Alopecuros aequalis, Digitaria sanguinalis, Echinochloa colona, Phalaris minor, Polypogon fugox, Cyperus difformis, C. dilutus, C. iria, C. sanguinolentus, Fimbristyllis littoralis, Chenopodium album, Coronopus didymus, Lindernia procumbens, Rumex crispus, Soliva anthemifolia, Stellaria media, S. aquatica, Commelina diffusa, Murdania sp. and Ceratopteri thalictroides were the common weeds. Vertical distribution of weed seed bank of grasses, sedges, and broadleaves showed in descending order from 5 cm to 20 cm in all season's soil samples and the pressure of most weeds was at 5-10 cm soil depth. The total number of weeds in seed bank per square meter ranged from 6,800 to 9,500 in 0-5 cm depth. Tillage affected on grass weed seed bank but had no consistent effect on sedges and neither on broadleaves over seasons. Sulfosulfuron and fenoxaprop affected on annual grass weed seed bank but not on broadleaf by the later. Bispyribac-sodium and anilophos both suppressed grass and sedge weed seed bank. Weed seed bank was influenced by management as well as soil depths.
机译：在温室中根据杂草种子库的大小和组成进行了研究，该研究是在田间进行的常规耕作和最小耕作下进行的，研究对象是5种杂草处理的小麦和干燥直接播种水稻，在0-5 cm的不同土壤深度下进行， 5-10厘米，10-15厘米和15-20厘米。实验于2001-2003年在尼泊尔胡马塔尔的农学农场进行。杂草种子库中的杂草种类数量多于田间。从三个季节收集的土壤种子库样本中检索到属于25个科的八十一种杂草。双子叶植物阔叶树在物种数量上排名第一，其次是草，莎草，单子叶植物阔叶树和蕨类植物。 Alopecuros aequalis，Digitaria sanguinalis，Echinochloa colona，Phalaris minor，Polypogon fugox，Cyperus difformis，C。dilutus，C.iria，C.sanguinolentus，Fimbristyllis littoralis，Chenopodium album，Coronopus didymus，Lindernia prothebenslia，Stroxella cumberias，Sum ，S。aquatica，白花蜜，Murdania sp。百里香和角头菜是常见的杂草。在整个季节的土壤样品中，草，莎草和阔叶杂草种子库的垂直分布从5 cm降到20 cm，并且大多数杂草的压力在5-10 cm土深处。在0-5厘米深度处，每平方米种子库中的杂草总数为6,800至9,500。耕作影响草杂草种子库，但对莎草和四季阔叶都没有持续的影响。磺胺磺隆和非诺沙普对一年生草杂草种子库有影响，但对阔叶则没有影响。双嘧菌酸钠和网纹癣菌均抑制草和莎草杂草种子库。杂草种子库受到管理以及土壤深度的影响。

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