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本研究表明 ,旱育秧床中土壤好气微生物总量高于对照 ,其中好气性固氮菌、纤维分解菌、氨化细菌、有机磷分解菌、亚硝酸细菌增加了 1 .40、2 0 .67、8.0 4、74.0 0、0 .69倍 ,除脱氢酶外土壤蛋白酶、纤维素酶、磷酸酶、尿酶和蔗糖转化酶活性比对照增加77.5%、51 .1 5%、47.1 2 %、43.59%、6.88% ,这有利于土壤物能转化 ,提高土壤养分的有效性 ,使旱育秧床土壤硝态氮、速效N、P、K比对照增加 2 7.9、2 .0 8、0 .97、0 .7倍 .同时还表明 ,旱育秧白根率高 ,根系氧化能力强 ,低节位分蘖多 ,并表现出强大的生理生化优势 ,淀粉酶、硝酸还原酶、ATP酶以及过氧化物酶、过氧化氢酶、超氧物歧化酶等保护酶含量增加 ,而丙二醛含量和膜透性比对照降低了 7.1 2 %和 43.42 % .
The results showed that the total amount of soil aerobic microorganisms in the dry seedbed was higher than that of the control, of which aerobic azotobacter, fibrolytic bacteria, ammoniated bacteria, organophosphorus decomposing bacteria and nitrite bacteria increased by 1.40, 0.267, 8.0 4,74.0 0,0 .69 times. The activity of soil protease, cellulase, phosphatase, urease and sucrose invertase increased by 77.5%, 51.1 5%, 47.1 2% and 43.59 %, 6.88%, which is conducive to the conversion of soil material and improve the availability of soil nutrients, so that soil nitrate nitrogen, available N, P, K increased by 2 7.9,2 .0 8,0 .97 compared with the control, 0 .7 times.At the same time, it also showed that the seedling rooting rate was high, the root oxidation ability was strong, the tillers with low node were more, and showed a great physiological and biochemical advantages, including amylase, nitrate reductase, ATPase and peroxidase, Catalase, superoxide dismutase and other protective enzymes increased, while malondialdehyde content and membrane permeability decreased by 7.12% and 43.42% compared with the control.