水位控制对农田泥炭藓产量的影响

为明确不同水位控制下农田土壤因子与泥炭藓产量之间的关系，解析影响泥炭藓产量的主要土壤因子，以贵州省龙里县水苔村种植年限相同的泥炭藓为研究对象，分析不同水位条件下泥炭藓生理生态指标与土壤因子的特征，并结合冗余分析，讨论水位和土壤因子的交互作用对泥炭藓生理生态指标的影响。结果表明：水苔村种植泥炭藓有1科1属5种，其中泥炭藓原亚种(Sphagnum palustre L. ssp.palustre)为优势种。泥炭藓生理生态指标均随水位升高逐渐上升，表明高水位有利于泥炭藓生长；土壤含水量(SWC, Soil Water Content)和孔隙度(STP, Soil Porosity)随水位升高逐渐增大，表明水位升高有助于增强土壤透水、透气及蓄水保墒能力；总氮(TN, Total Nitrogen)、总磷(TP, Total Phosphorus)、总钾(TK, Total Potassium)、有效磷(AP, Available Phosphorus)随水位升高逐渐降低，表明水位升高加速氮磷钾等营养元素淋失；脲酶(URE, Urease)和过氧化氢酶(CAT, Catalase)随水位升高逐渐...

Effects of water level control on sphagnum yield in farmland

This study aims to reveal the relationship between farmland soil factors and production of Sphagnum under the conditions of different water levels, then reveals the most primary soil factor which affected the output of Sphagnum. Sphagnum with similar planting ages was collected as research object in Shuitai Village, Longli country, Guizhou Province. Combined with Redundancy analysis, the impacts of interaction between different water levels and soil factors on the characteristics of the Sphagnum physiological and ecological indexes were discussed. The results indicated that after identification, 5 Sphagnum species with the same genus were found, among which Sphagnum palustre L. ssp. Palustre was the dominant species. The physiological and ecological indexes increased with the rise of water level, which indicated that the higher water level would make for the growth of Sphagnum. Soil Water Content (SWC) and soil porosity (STP) increased as the water level rose, indicating that the rise of water level played a certain role in enhancing soil permeability, air permeability, and water storage capacity. Total nitrogen (TN), total phosphorus (TP), total potassium (TK) and available phosphorus (AP) were dropped down as the water level rose, indicating that the higher water level may accelerate the leaching of nutrient elements such as nitrogen, phosphorus and potassium. Urease (URE) and catalase (CAT) were growing with the rise of water level, which can be inferred that soil moisture content can improve soil enzyme activity. The physiological and ecological indexes of S.palustre showed a clearly negative correlation with soil factors such as TN, TP, TK and AP (P<0.05), speculating that nutrient elements like N, P and K may inhibit the growth of Sphagnum. The other soil factors were significantly correlated positively with indexes of S. perustre (P<0.05), among which water level (WAT), URE and SWC also showed a clear positive correlation (P<0.01), indicating that WAT, URE and SWC may contribute to the growth of spitmoss. However, it is necessary to ensure that the soil is acidic and nutri-poor in order to increase the yield of Sphagnum. It is important to increase the water level of the groove to about 0-5cm with increasing the porosity and relaxation of the soil.