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以大蒜为试材,为缓解中牟大蒜连作障碍,试验从调节土壤营养平衡的农艺措施入手,研究了常规施肥作对照(CK)、常规施肥+抗重茬剂(T1处理)、常规施肥+硫酸锌22.5kg/hm2+钼酸铵0.45kg/hm2(T2处理)、常规施肥+腐植酸900kg/hm2(T3处理)、常规施肥+石膏300kg/hm2(T4处理)对缓解大蒜连作障碍的影响。结果表明:缓解连作障碍效果最好的是T3处理,与CK相比大蒜产量提高了10.36%,达到显著水平;土壤pH值为8.32,有机质含量达到1.69%,钼、锌、速效氮、速效磷和速效钾等营养元素的含量也显著提高;土壤磷酸酶、过氧化氢酶和脲酶的活性显著提高;土壤中细菌和放线菌数量增加,真菌数量下降,使三大菌群的比例更为合理;植株的叶绿素含量和抗氧化能力也显著提高,从而提高了植株的光合效率和抗逆性。
Taking garlic as test material, in order to alleviate the continuous cropping obstacle of Zhongmou garlic, the experiment started with the agronomic measures that adjusted the nutrition balance of soil. The effects of conventional fertilization (CK), conventional fertilization + anti-stubble agent (T1 treatment) The effect of 22.5kg / hm2 + ammonium molybdate 0.45kg / hm2 (T2 treatment), conventional fertilization + humic acid 900kg / hm2 (T3 treatment) and conventional fertilization + gypsum 300kg / hm2 (T4 treatment) The results showed that T3 treatment was the best one to alleviate the continuous cropping obstacle, the yield of garlic increased 10.36% compared with CK, the soil pH value was 8.32, the content of organic matter reached 1.69%, the contents of molybdenum, zinc, available nitrogen, available phosphorus And available potassium were also significantly increased. The activities of soil phosphatase, catalase and urease were significantly increased. The number of bacteria and actinomycetes in soil increased and the number of fungi decreased, making the proportion of the three major groups more Reasonable; plant chlorophyll content and antioxidant capacity also significantly increased, thereby increasing the plant’s photosynthetic efficiency and resistance.