藻类活性细胞生物肥对苜蓿地土壤肥力的影响

Effect of Active Cell Biofertilizer on Soil Fertility of Alfalfa Land

摘要: 为了观察藻类活性细胞生物肥对土壤肥力的影响，试验选择总面积28.3公顷的苜蓿草基地(圆形)，其中试验区为8.3公顷，对照区为20.0公顷。于2021年4月20日在试验区每亩按3000 mL的量施藻类活性细胞生物肥一次，于6月20日试验结束，为期60 d。开始之前和试验结束后，分别从试验区和对照区中心部位用S形方法取土壤样品，并检测肥力指标，包括全氮、全磷、全钾、有机质和pH值。结果显示，① 试验开始之前对照区和试验区肥力指标均不显著(P > 0.05)；② 对照区试验前后，pH值以及全氮和全磷含量试验后显著提高(P < 0.05)；③ 试验区试验前后，有机质含量显著上升(P < 0.05)，全氮含量极显著提高(P < 0.01)。而pH值以及全磷和全钾含量则试验前后无显著差异(P > 0.05)；④ 施用藻类活性细胞生物肥，使土壤有机质含量和全氮含量显著上升(P < 0.05)，对土壤其他指标没有显著影响(P > 0.05)，总之，藻类活性细胞生物肥对土壤肥力的提升具有显著的功效。

Abstract: In order to observe the effect of algae active cell biofertilizer on soil fertility, the alfalfa base (round) with a total area of 28.3 hectares was selected, of which the experimental area was 8.3 hectares and the control area was 20.0 hectares. On April 20, 2021, 3000 mL biofertilizer of algae active cells was applied once per mu in the experimental area, and the experiment ended on June 20, 2021 for 60 days. Before and after the experiment, soil samples were taken from the center of the experimental area and the control area by S-shaped method, and the fertility indexes were detected, including total nitrogen, total phosphorus, total potassium, organic matter and pH value. The results showed that: ① Before the experiment began, the fertility indexes of the control area and the experimental area were not significant (P > 0.05); ② Before and after the experiment in the control area, the pH value, total nitrogen and total phosphorus content increased significantly after the experiment (P < 0.05); ③ Before and after the test, the content of organic matter increased significantly (P < 0.05) and the content of total nitrogen increased significantly (P < 0.01). However, there was no significant difference in pH value, total phosphorus and total potassium content before and after the experiment (P > 0.05). ④ The application of algae active cell biofertilizer significantly increased soil organic matter content and total nitrogen content (P < 0.05), but had no significant effect on other soil indexes (P > 0.05). In a word, algae active cell biofertilizer has significant effect on improving soil fertility.