氮素营养对油菜宁杂1号结角层中角果性状的影响  

Effects of N application on pod characteristics among different layer of pod canopy in Ningza No.1 (Brassica napus L.)

作　　者：冷锁虎 杨光 陈秀良 陈维栋 叶敬安 

机构地区：[1]扬州大学,江苏扬州225009

出　　处：《中国油料作物学报》2002年第3期25-28,共4页Chinese Journal of Oil Crop Sciences

基　　金：江苏省"九五"重点攻关项目(BE96327)

摘　　要：采用不同施氮处理,研究了甘蓝型冬油菜宁杂1号结角层中角果经济性状的变化,结果表明:(1)油菜的角果数有85%～90%分布在结角层上部的10～60cm之内;(2)每角粒数和千粒重一般以结角层中上部最高,下层减小,每角粒数下降的幅度较大,千粒重下降幅度相对较小;(3)单位角果皮面积生产力(PPA)一般以结角层上部最高,下层只有最大值的2 3左右;(4)适量施用氮肥,能促使各结角层角果的经济性状较为协调,形成高效结角层。The trials of different N application were carried out in experimental farm of Yangzhou University. The Pod characters among different layers of pod canopy were measured. The results were as follows. (1) 85%～90% of pod numbers were distributed in the layers of upper 10～60cm. (2) The seeds per pod and 1000-seed weight of upper and middle layers were the most, and the lower the layer of pod canopy, the less the seeds per pod and 1000-seed weight. In pod canopy, the change of seeds per pod was larger than that of 1000-seed weight. (3) The productivity per unit pod area (PPA) of upper layer was usually the highest, and that of bottom layer was about 2/3 of the highest value. (4) Moderate N application can regulate the pod characters of pod canopy and form high efficiency pod canopy.

关 键 词：氮素 油菜 宁杂1号 结角层 角果性状 营养水平 

分 类 号：S565.4[农业科学—作物学]