论文部分内容阅读
2013年3月中旬至4月上旬,辛集市冬小麦田麦苗春季返青后普遍出现黄化现象,发生面积约占30~50%,程度稍有差异。主要症状:全株黄化,叶绿素减少,叶片或叶尖不枯死。从田间看呈现云彩状。后期持续发展,使分蘖能力降低,亩穗数减少、小穗数减少、结子率下降,对产量影响较大。根据现场调查及询问农户的施肥管理情况,确定不是缺少氮肥引起的黄化,分析原因是气候
In mid-March to early April 2013, the yellowing of wheat seedlings in the winter wheat field of Xinji City occurred after springing back to the green, with an area of about 30-50%, with a slight degree of difference. The main symptoms: whole plant yellow, reduce chlorophyll, leaf or tip is not dead. Looked like a cloud from the field. The sustainable development in the later period reduced the ability of tillering, decreased the number of ears per acre, reduced the number of spikelets and decreased the yield of knot, which had a great influence on the yield. According to on-site survey and fertilization management of farmers to determine is not lack of yellowing caused by nitrogen fertilizer, the analysis is due to climate