通过江苏省东台市黄海原种场田间试验,研究施加磷石膏和糠醛渣对滨海盐碱地土壤改良和番茄菌根化苗生长及其果实品质的影响.结果发现,番茄菌根化苗移栽至盐碱地后根系丛枝菌根(Arbuscular mycorrhizal.AM)真菌侵染率及土壤碱性磷酸酶活性均显著高于非菌根化的对照苗(P〈0.05),土壤pH则显著低于对照(P〈0.05):住此荩础上施加磷石膏和糠醛渣对AM真菌侵染率均无显著影响,其中施磷石膏处理可进一步降低土壤pH(P〈0.05),但土壤电导率趋于升高.番茄最终收获时菌根化苗的果实产量及其可溶性糖酸比均娃著高于对照苗(P〈0.05),存此垠础上施加磷石膏与糠醛渣处理果实的可溶性固体物含量均皿著升高(P〈0.05),其中施糠醛渣处理果实的维生素C含最趋于升高,而硝酸盐含量则显著下降(P〈0.05).本研究表明,菌根化育苗在滨海盐碱地番肺栽培中有较好的应用效果,而施加磷石膏和糠醛渣可进一步促进菌根化苗生长并改善番茄果实品质,其中施用糠醛渣的效果尤佳.图1表3参37
A field experiment conducted in the coastal area of Dongtai City, Jiangsu Province was carried out to investigate the effects of phosphogypsum (PG) and furfural residue (FR) on soil amelioration and the growth and quality of mycorrhizal tomato on a saline-alkali field. After transplanting to the saline-alkali field, arbuscular mycorrhizal (AM) colonization rate of the mycorrhizal seedlings and the related soil alkaline phosphatase activity were significantly higher (P 〈 0.05) than those of the non-mycorrhizal seedlings, with a significantly lower (P 〈 0.05) soil pH. However, PG and FR had no effect on AM colonization rate of the mycorrhizal seedlings. PG decreased soil pH significantly (P 〈 0.05), but tended to elevate soil electrical conductivity. The yield and soluble sugar-to-acid ratio of tomato fruit of mycorrhizal seedlings were significantly higher (P 〈 0.05) than those of tile non-mycorrhizal seedlings, and both PG and FR could significantly increase (P 〈 0.05) fruit soluble solids content of the mycorrhizal seedlings. In addition, FR tended to increase fruit vitamin C content of the mycorrhizal seedlings, and significantly decrease (P 〈 0.05) fruit nitrate content. It suggested that mycorrhizal seedlings can be applied in tomato producing on saline-alkali fields; though both PG and FR can promote the growth and quality of mycorrhizal tomato, FR has better effects than PG.