小豆生长发育规律研究 Ⅹ．小豆群体干物质生产与产量形成的关系

以JN2、JN5、JN6、JN7等4个不同粒型的红小豆品种为材料,研究了小豆群体干物质生产与产量形成的关系。结果表明:(1)夏播小豆的群体生产量变化表现为前期增长慢,从8月中旬开始快速增长。(2) JN2、JN5、JN6、JN7在开花期最适宜的干物重积累量分别为368．64、339．66、354．72和406．08 kg/hm2,生育后期干物质积累JN2为6 241．36 kg/hm2时产量最高,而其他3个品种后期累积量在4 000 kg/hm2左右即可达到预期目标。(3)开花期的叶面积指数,JN2应控制在6-7之间,JN6控制在4-6之间,JN5控制在4左右, JN7控制在3左右为最适,产量较高。(4)在中等肥力大田生产条件下,JN2适宜高密度(36万株/hm2)种植, JN5和JN7适宜中低密度(18万株/hm2)种植,JN6适宜中高密度(24万株/hm2)种植。

Research on Growth and Developmental Rhythm of Adzuki Bean X. Relationships between Population Matter Productions and Yield Formation in Adzuki Bean

Four adzuki bean varieties (JN2, JN5, JN6, and JN7) were used to investigated the relationship between population matter production and yield formation. The results showed: (1) the population matter production of summer sowing in the early stage were increased slowly, but increased more fast after mid-August. (2)the most suitable population matter production amount in flowering period for JN2 , JN5 , JN6 and JN7 were 368. 64kg/hm2, 339. 66kg/hm2, 354. 72kg/hm2 and 406. 08kg/hm2, respectively. In later flowering period, the yield of JN2 couid reach the highest one when it's population matter production amount was 6241. 36kg/hm2; and another three varieties could reach the target while their amount were about 4000 kg/hm2. (3) the I of JN2, JN6, JN5 and JN7 in the flowering period should be controlled among 6-7, 4-6, 4. 0 and 3. 0 , respectively,and then their yield was relatively higher. (4) JN2 was suitable for planting in a high density (360 000·hm-2), JN5 and JN7 were suitable for a mid-low density (180 000· hm-2), and JN6 was suitable for the mid-high density (240 000·hm-2).