叶面喷施硼肥对西北旱寒区冬油菜保护酶、产量及经济性状的影响

本试验研究了叶面喷施不同浓度硼肥对西北旱寒区冬油菜（Brassica napus）保护酶、产量及经济性状的影响。结果表明，适当施硼可以诱导旱寒区冬油菜保护酶SOD、POD、CAT 和APX活性提高，硼浓度为0.16%时SOD、CAT和APX活性最高。喷施硼肥处理的冬油菜，其株高、分枝部位、主花序长度、主花序有效角果数、全株有效角果数、角果长度、角果粒数、千粒重和单株产量均明显高于对照。硼肥浓度为0.16%时冬油菜产量和含油量最高，较对照分别高36.85%和14.52%。西北旱寒区冬油菜最佳叶面喷施硼肥浓度为0.16%。

Effects of different concentrations of boron on protective enzyme activity, yield and agronomic characteristics of winter rapeseed in Northwest China

Effects of different concentrations of foliar application with boron on the protective enzyme activity, yield and agronomic characteristics of winter rapeseed in cold and drought region of northwest China were studied. The results showed that proper concentrations of boron could improve the activities of protective enzyme SOD, POD, CAT, and APX. The activities of SOD, POD, CAT, and APX were highest when foliar application with 0.16% boron was carried out. The foliar application with boron treatments had significant effect on agronomic characteristics of winter rapeseed. Plant height, branch height, length of main florescence, silique of main florescence, total of plant, length of silique, seeds per silique, 1000 seed weight and yield per plant were higher than the control. The yield and oil content were highest when foliar application with 0.16% boron was performed. Compared to control, yield and oil content was increased by 36.85% and 14.52% respectively. The optimized concentration of foliar application with boron is 0.16% for winter rapeseed in cold and drought region of northwest China.