抗寒复合剂对白菜型冬油菜生长发育及产量性状的影响

以超强抗寒性冬油菜品种陇油6号、陇油7号和弱抗寒性品种天油2号、天油4号为材料,研究了低温(-5℃)胁迫下几种抗寒复合剂对白菜型冬油菜叶片相对电导率、丙二醛含量及越冬率、农艺性状、生育期、经济系数、产量变化的影响。试验设6种处理:T1,蒸馏水(CK);T2,20 mg·L~(-1)ABA;T3,20 mg·L~(-1)ABA+300 mg·L~(-1)PEG-6000;T4,20 mg·L~(-1)ABA+50 mg·L~(-1)PP333;T5,20 mg·L~(-1)ABA+300 mg·L~(-1)PEG-6000+50 mg·L~(-1)PP333;T6,20 mg·L~(-1)ABA+300 mg·L~(-1)PEG-6000+50 mg·L~(-1)PP333+10 g·L-1尿素。结果表明,喷施抗寒复合剂能显著提高白菜型冬油菜的越冬率,其中T5处理越冬率达到91.97%,较CK增加18.87%;抗寒复合剂处理,参试材料叶片相对电导率和丙二醛含量在各个处理下较CK平均降低25.43%和25.36%,并且使根颈直径、全株有效结角数、单株产量、经济系数、产量显著增加,生育期延长。通过隶属函数法和主成分打分,不同抗寒复合剂的抗寒效果为T5T6T4T3T2CK。

Effect of cold-resistant compounds on growth and yield of winter rapeseed(Brassica rapa L.)

A field experiment was conducted on Longyou 6,Longyou 7 and Tianyou 2 and Tianyou 4,(Lonyou 6 and Longyou7 have super strong cold resistance;Tianyou 2 and Tianyou 4 have weak cold resistance) to identify the effects of cold-resistant compounds on the leaf relative electrical conductivity,MDA content,overwintering rates,agronomic traits,growth period,economic coefficient and yield change of winter rapeseed (Brassic rapa L.) at minus five degree.6 types of treatments were designed:T1,distilled water(CK);T2,20 mg· L-1 ABA;T3,20 mg· L-1 ABA + 300 mg· L-1 PEG-6000;T4,20 mg·L-1 ABA + 50 mg·L-1 PP333;T5,20 mg·L-1 ABA + 300 mg·L-1 PEG-6000 + 50 mg ·L-1 PP333;T6,20 mg·L-1 ABA + 300 mg·L-1 PEG-6000 +50 mg·L-1 PP333 + 10 g·L-1 urea.We found that the overwintering rates achieved 91.97％ under T5,increased by 18.87％,compared with CK.Mter spraying cold-resistant compounds,compared with ck,the leaf relative conductivity and MDA content averagely decreased by 25.43％ and 25.36％ respectively,and root collar diameter,pods per plant,yield per plant,economic coefficient,and yield increased significantly,as well as growth period prolonged.In terms of cold-resistance effects,the treatments sequenced in the way of T5 ＞ T6 ＞ T4 ＞ T3 ＞ T2 ＞ CK,according to subordinate function analysis and the principal component scores.