大豆打顶试验结果初报

2005年进行的冀黄12和中黄19两个大豆品种的打顶试验结果表明, 冀黄12在苗高27.5 cm、中黄19在苗高30.0 cm时打顶4 cm,大豆经济性状表现最好,生育期可缩短3～4 d,单株结荚数增加11.30～11.58个,单株粒数增加31.04～36.73粒,折合产量最高,分别为3 683.33、3 800.00 kg/hm2,分别较CK1、CK2(不打顶)增产38.4%、40.3%,且与CK1、CK2产量差异达极显著水平.打顶过长(6 cm)会减少单株结荚数、单株粒数和单产.

The Preliminary Report of Trials on Removing Tips of Soybean

The methods of removing tips were used for two soybean varieties Jihuang 12 and Zhonghua 19 in 2005. The results showed that Jihuang 12 plant height was 27. 5 em and Zhonghuang plant height was 30. 0 em, when removing tips of 4 em, soybean economic characters were best. The growing period shortened 3-4 d. The pods per plant and seed per plant respectively increased 11.30-11.58 and 31.04-36. 73. The yield were 3 683. 33 kg/hm^2 and 3 800. 00 kg/hm^2, which was 38.4% and 40. 3% higher than that of the check and had significant difference with CK1 and CK2. If removing tips of 6 cm, pods per plant, seed per plant and single birth will decrease. The economic characters difference of other varieties should have further study.