分别以香根草（Vetiveria zizanioides）和风车草（Cyperus alternifolius）为植被，按1.0m×0.5m×0.8m建立人工湿地，通过4季测试，研究其对猪场废水有机物的净化功能及其随季节、进水浓度及水力停留时间变化的规律结果表明，4个季节香根草或风车草人工湿地对COD和BOD有较稳定的去除效果，两湿地抗有机负荷冲击能力强在春季，停留时问1-2d，COD和BOD去除率分别为70%和80%；在夏季，进水COD高达1000～1400mg•L-1情况下。COD去除率接近90%；在秋季。停留时间1～2d，COD和POD去除率分别为50%～60%和50%；在冬季。进水COD达1003mg-L1情况下，COD去除率在70%以上COD、BOD和SS的去除率在两湿地间没有显著差异。人工湿地污染物（Y）随水力停留时间（t）延长的降解遵从指数方程规律yt=Y0-e（-kt）在相同停留时问时，随进水污染物浓度（x）提高的出水污染物浓度（y）的回归关系遵从直线方程规律y=a十bx。

中国农业的发展尽管处于以经济效益为核心的农业工业化前期，但人均资源短缺和对农业产出的压力已使农业生态问题相当突出。因此，中国必须现在就正视农业的生态合理化问题。生态农业建设的关键是通过评价和设计，选定合适的生态农业模式。通过强有力的立法和行政措施，可以加速我国农业发展的生态合理化过程。

对农业生态系统模式的内涵及其基本特征、模式的类型划分方法及其描述方法， 以及农业生态系统模式的研究内容与方法进行了系统探讨。认为农业生态系统模式具有地域性与适应性、整体性、时空特性、阶段性、应变性与弹性、相对优劣性等基本特征。文中提出了农业生态系统模式的综合分类系统， 即包括区域自然环境特征、地貌形态特征、产业链结构、时空结构和经营属性在内的五级分类指标系统。农业生态系统模式的主要研究内容与方法包括模式调查、模式设计、模式评价、模式试验、示范与推广等几个方面。

Our previous work indicated that secalonic acid F (SAF) was the major allelochemical produced by Aspergillus japonicus. Studies showed that SAF markedly inhibited the seedling growth of sorghum (Sorghum vulgare Pers.), hairy beggarticks (Bidens pilosa L.), and barnyardgrass (Echinochloa crus-galli (L.) Beauv.). It significantly reduced the activities of superoxide dismutase (SOD) and peroxidase (POD) at a concentration of 0.3 mM. Secalonic acid F enhanced malondialdehyde (MDA) contents, but it lowered the content of chlo-rophyll (CHL) a and b as well as the photosynthetic rates of tested plants. Respiration, membrane permeability, and abscisic acid (ABA) content increased after treatment with SAF, but the reduction activity of the root system was lowered. There is no remarkable change in the soluble proteins of plants that are treated with SAF. Transmission electron microscope (TEM) observations showed that treated plants exhibited amorphous mitochondria without integral membranes and swelling chloroplasts without membranes in a disorderly arrangement. The SAF treatment also damaged the stratiform structure of the chloroplasts and the membranes and structure of the nuclei. These tissues against membrane lipid peroxidation and damage the whole membrane system of plants, resulting in the ultrastructure destruction of chloroplasts, mitochondria, and nuclei. Cell ultrastructure destruction causes a reduction of photosynthesis and root activities and an increase in respiration. These abnormal physiological processes contribute to the inhibition of plant growth.

彩色豆马勃能与松树、桉树形成外生菌根，研究其次生代谢产物对植物的影响具有重要意义。用水、乙醇和丙酮抽提彩色豆马勃的子实体，发现这些抽提物对稗草和水稻幼苗生长有极显著的抑制作用。丙酮抽提物对狼尾草和油菜幼苗生长有抑制作用。子实体的丙酮抽提物用硅胶柱色谱分离得到2个纯化合物，可鉴定为豆马勃内酯（Pisolactone）和麦角甾醇。该2个化合物在400μg•ml-1浓度下均显著抑制稗草幼苗根生长。豆马勃内酯在100μg•ml-1浓度下仍然极显著抑制稗草幼苗根生长。