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暴雨高温来袭作物生长受限

2017-08-21 10:33:21   中国经济网

上周,我国雨水条件较好,东北及华北旱情得到缓解。不过,南方遭暴雨侵袭,局地作物绝收,周后期华南、江南、西南高温,一季稻扬花授粉受阻。与此同时,降雨同样发生在美国大部,玉米、大豆长势得以改善,但北部春小麦收获进度受到影响。

我国作物产区

上周,我国雨水充沛。东北大部、华北及西北有不同程度降水,有效缓解旱情,但部分产区雨势强劲,并伴有强对流,天气状况不利于玉米等作物的生长。而黄淮水热较好,基本适宜玉米生长。上周初,西南及长江中下游暴雨肆虐,局部暴发洪涝,农作物绝收,而周后期,天气转晴,虽利于水分消散,但副高加强,华南、江南及西南均被高温笼罩,不利于一季稻的扬花授粉。

“三伏天”已于上周结束,高温却在继续。本周,预计我国大部产区气温较常年同期偏高,黄淮玉米处于灌浆期,持续高温将缩短灌浆时间,进而威胁品质。此外,华北及西北北部雨量偏多,可有效补充土壤水分。受前期降雨影响,南方水稻产区湿度偏大,再加上华南、江南都笼罩在高温之中,病虫害发生发展,不利于作物生产。

北美作物产区

上周,美国产区的大范围降雨由西向东移动,玉米、大豆长势有望得到改善。不过,北部平原春小麦收获进度可能受阻。

本周,美国产区降水量不算多,中部平原没有明显降水,总体偏干,而北部产区的干旱区有良好降雨预期。玉米带东部产区本周后期将有小雨。此外,美国产区还会有一个缓慢的降温过程,天气状况总体适宜玉米、大豆生长。

欧洲作物产区

上周,英国、德国持续降雨,虽然周中出现短暂晴朗,但待收小麦的品质受到影响。另外,德国新季油菜已经开始播种,其同样受到降雨影响。西班牙仅周初有小雨,之后基本晴朗,而且高温在35℃以上,干热天气加重干旱。

本周,德国降雨将停止,麦收工作有望加速,而英国小麦品质仍受降雨的不利影响。此外,法国降水暂停,气温上升,暂时不会对玉米生长造成威胁。

东南亚作物产区

上周,印度强降雨活跃,部分产区累计雨量较大,暴发洪涝,威胁作物产量。本周,印度东北部雨量减少,有助于散墒,作物生长环境改善。

上周,棕榈产区雨势不大,且多为短时阵雨,气温基本稳定,棕榈树生长良好。马来西亚与印尼大部降水增加,利好棕榈树生长,棕榈油产量预期良好,但棕榈果采收及运输受阻。

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