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首页> 外文期刊>雑草研究 >Occurrence and Control of Weeds in Direct-seeded Rice Paddy in Korea
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Occurrence and Control of Weeds in Direct-seeded Rice Paddy in Korea

机译：韩国直播稻田杂草的发生与控制

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The planted area of direct-seeding rice cultivation in Korea, which began in 1991, increased remarkably up to 117,500 ha in 1995, but decreased to 63,900 ha in 1998 and then rose to 71,700 ha in 1999. Farmers preferred dry paddies to flooded paddies at first for direct-seeding, but in recent years this has changed due to frequent rainfalls at seeding time. The number of weed species occurring in paddy fields in Korea was 23 in direct seeding on dry paddy and 18 in direct-seeding on flooded paddy. Echinochloa crus-galli was the most dominant weed species in direct-seeding on dry paddy and was followed by Cyperus difformis, Cyperus serotinus, Ludivigia prostrata and Aneilema japonica. The dominant weed species in direct-seeding on flooded paddy were Echinochloa crus-galli, Eleocharis kuroguwai, Scirpus hotarui, Monochoria vaginalis and cyperus difformis. On the contrary, Eleocharis kuroguwai, Sagittaria pygmaea, Sagittaria trifolia, Echinochloa crus-galli and Monochoria vaginalis were dominant weedsin machine transplanted paddy fields. Occurrence of weedy rice, especially red rice, was also increased greatly in directly-seeded rice fields, although effective herbicides or other practical control methods are not yet developed. The recommended herbicide application for controlling weeds in direct seeded dry paddies and flooded paddies in Korea is the systemic application of two time points: before and after water logging, in case of medium weed occurrence. Additional application is recommended for heavy weed occurrence. It seems that direct seeding is one of the most attractive rice cultivation techniques for labor and cost saving. However, it is still an unstable technique because of poor seedling establishment, more occurrence of weedy rice, lodging problem and lack of satisfactory seeding machines. Direct-seeding rice cultivation is expected to increase in future by farmers in Korea who understand the technique better.
机译：1995年开始的韩国直播水稻种植的种植区在1995年增加了117,500公顷，但在1998年下降至63,900公顷，然后在1999年上升至71,700公顷。农民优先于碎桨的干桨粉末首先进行直播，但近年来，由于播种时间频繁降雨，这发生了变化。在韩国稻田中发生的杂草种类的数量为23例，在干燥的稻田和18中直接播种，直接播种淹没。 Echinochloa Crus-galli是干燥稻草直接播种中最占优势的杂草物种，其次是Cypetus difformis，Cypetus serotinus，Ludivigia prostrata和japonica。洪水稻草直播中的主导杂草种类是Echinochloa Crus-Galli，Eleocholis Kuroguwai，Scirpus hotarui，Monochoria阴道和豆荚差异。相反，Eleocharis Kuroguwai，Sagittaria pygmaea，射手芽孢杆菌，echinochloa crus-galli和Monochoria阴道都是占主导地杂草机移植稻田。杂草米饭，特别是红米，直接种子稻田的发生也大大增加，尽管尚未开发有效的除草剂或其他实际控制方法。推荐的除草剂用于控制杂草直接播种的干桨和韩国的洪水划分的应用程序是两个时间点的全身应用：在中期杂草发生的情况下，水井测井前后。建议额外的申请进行重型杂草发生。似乎直接播种是劳动力和节能成本最具吸引力的水稻栽培技术之一。然而，由于苗木建立不佳，杂草稻米，住宿问题和缺乏令人满意的播种机，它仍然是一种不稳定的技术。预计韩国的农民将来会增加直接种植水稻栽培，他们更好地了解该技术。

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