摘要
选择不同浓度的大豆根系分泌物,研究其对4种主要农作物的化感作用。结果表明,提高大豆根系分泌物浓度,对小麦种子萌发有促进作用,对大豆、玉米、白菜种子的萌发有抑制作用;大豆根系分泌物随着浓度的增大而显著增强小麦、玉米超氧化物歧化酶(SOD)总活性和根活力,极显著抑制大豆SOD总活性和根活力;大豆根系分泌物随着浓度的增大对3种供试作物丙二醛(MDA)含量表现不同作用,使小麦MDA含量极显著降低,使大豆MDA含量极显著增加,对玉米MDA含量变化影响不大。大豆根系分泌物对供试小麦、大豆植株高度及其干重、胚根长及根干重表现为低浓度促进、高浓度抑制作用。大豆根系分泌物浓度的增大导致其对玉米植株高度及其干重、胚根长及根干重化感作用增强。
The allelopathy of different densities of soybean root exudates on 4 main crops was studied. The results showed that the increasing of soybean root exudates density promoted the germination of wheat seeds, but inhibited the germination of soybean, corn and Chinese cabbage seeds; with the increasing of exudates density, the gross activity of SOD and the root activity of wheat and corn were enhanced soybean root significantly,but those of soybean were inhibited. However, the role of MDA content was different, with the increasing of soybean root exudates density, the MDA content of wheat decreased significantly, the MDA content of soybean increased significantly, the MDA content of corn changed little. The low density of soybean root exudates promoted plant height and dry weight, radial length and root dry weight of wheat and soybean, while the high density inhibited them; and for those of corn, the alleopathy was enhanced.
出处
《东北农业大学学报》
CAS
CSCD
2008年第10期1-5,共5页
Journal of Northeast Agricultural University
基金
黑龙江省自然科学基金重点项目(ZJN0701)
