S和P元素对荷兰豆幼苗生长的影响.doc

摘要：本文采用室内沙培试验，分别研究了S和P元素在不同浓度下对荷兰豆幼苗生长发育（根长、株高、鲜重、干重、组织水含量），生理生化（叶绿素、丙二醛、脯氨酸）的影响。结果表明：S、P元素对荷兰豆幼苗生长发育、生理生化有重要作用。S、P元素浓度的降低分别抑制着荷兰豆幼苗的生长发育，荷兰豆幼苗的根长，株高随着S、P元素的降低而生长缓慢。此外，s、P元素浓度降低也不同程度地减少了荷兰豆幼苗的鲜重、干重，组织水的含量。其中在缺S处，干重是对照组的66.9%，组织水是对照组的73.6%。缺P处干重是对照组的73.4%，组织水含量是对照组的76.4%。在生理生化方面，S、P元素的降低会导致叶绿素含量的减少，丙二醛和脯氨酸含量的增加。缺S处，丙二醛含量是对照组的138%，脯氨酸含量是对照组的158%。缺P处，丙二醛是对照组的142%，脯氨酸含量是对照组的161%。 

关键词：荷兰豆；P元素、元素S；抑制作用

Abstract：In this article, it used the indoor sand cultivates experiment to study the change rule of   SweetPea seedlings’ growth (root length,plant lenght,dry weight,fresh weight、water content) and physiological and biochemical (chlorophyll, malondialdehyde ,proline ). The result showed that:  The decreasing of sulphur and phosphorus content had controlled the growth of SweetPea hardly. Root length and plant length of SweetPea seeding both Slow growth in different degrees with the lessen of sulphur and phosphorus content .The dry weight、fresh weight and water content of SweetPea seedling both reduced in different degrees with the lessen of sulphur and phosphorus content . Which in a lack of sulphur place, the dry weight is 66.9% in control group . the water content is 73.6% in control group. Which in Which in a lack of phosphorus place, the dry weight is73.4% in control group. The water content is 76.4% in control group. In the ways of physiological and biochemical , Chlorophyll content were decreased following with the lessen of sulphur and phosphorus content , The content of proline and malondialdehyde were increasing with the reducing of sulphur and phosphorus content. At the most serious place lack of sulfur, The content of malondialdehyde is 138% in the control group.Proline content is158% in the control group. At the most serious lacking of phosphorus place .The content of malondialdehyde is 142% in the control group. Proline content is 161% in the control group.

Key words: SweetPea ;  sulphur ；phosphorus;  inhibit