论文部分内容阅读
为研究大豆叶面氮素的应用效果,以黑龙江省三江平原大豆主栽品种‘合农64’为试验材料,研究不同时期叶面施氮量对大豆叶片叶绿素含量及干物质积累的影响。结果表明,随着施肥量增加,叶绿素含量及干物质积累量呈现先上升后下降的趋势,不同时期普遍在B3处理达到最高值;A1时期叶面施氮有利于叶绿素含量及无籽粒干物质积累量增加,A3时期叶面施氮有利于籽粒干物质积累及产量形成。在A1B3处理组合下大豆叶片叶绿素含量最高,SPAD值为49.30;在A3B3处理组合下籽粒干物重最高,为26.08 g。因此,就‘合农64’这一品种而言,利于产量形成的最佳处理组合为A3B3,如果在A1B3和A3B3都进行处理,产量结果可能会更高。
In order to study the application effects of nitrogen on soybean leaves, the main soybean variety ’Heinong 64’ in Sanjiang Plain of Heilongjiang Province was used as experimental material to study the effects of nitrogen application rate on chlorophyll content and dry matter accumulation of soybean leaves in different periods. The results showed that with the increase of fertilizer application, the content of chlorophyll and the accumulation of dry matter firstly increased and then decreased, and reached the highest values at B3 treatment in different periods. Leaf nitrogen application at A1 was beneficial to the accumulation of chlorophyll and seedless matter The amount of nitrogen application at the A3 stage was conducive to the accumulation of dry matter and the formation of grain yield. Under the treatment of A1B3, the content of chlorophyll in soybean leaves was the highest, with a SPAD value of 49.30. Under the treatment of A3B3, the dry weight of grain was the highest, which was 26.08 g. As a result, the best treatment combination for yield formation for ’Henong 64’ is A3B3, which may be more productive if both A1B3 and A3B3 are processed.