冷害对黑龙江克拜地区大豆农艺性状及产量的影响

为了防御低温冷害，通过对受冷害与未受冷害材料进行比较分析，研究冷害对大豆农艺性状及产量的影响。结果表明：冷害使大豆减产，百粒重减轻，差异达1％显著水平；同时大豆成熟期延后，生育日数增加；此外，冷害还可使大豆株高、底荚高、主茎节数、主茎荚数、全株荚数、全株粒数、完全粒率变小。通过毁种试验得知，为挽回冷害损失，当遭受中度或者重度冷害时应该毁种。

Effects of Cold Damage on Agronomic Traits and Yield of Soybean in Kebai Region of Heilongjiang Province

In order to defease cold damage happen,cold damage soybean material and non-cold damage soybean material was comparative analyzed, the effects of cold damage on agronomic trait and yield of soybean were studied. The results showed that cold damage could decrease yield and 100-seeds weight of soybean and the significant difference was at 1 % level;cold damage could also delay maturity and increase growing days of soy- bean,In addition,it could lessen soybean plant height, height of bottom pods, number of nodes and pods on main stem,number of grains of whole plant and full grain rate,the destroyed planting test was made for resto- ring cold damage losses, when soybean suffered from moderate or severe cold damage, it should be destroyed and replanted.