猪粪及其堆肥不同水浸提比对种子发芽特性指标的影响

以猪粪及其堆肥为供试样品,在水浸提比（W/V）1：10、1：20、1：30、1：40、1：50、1：60的条件下,采用浸提液室内培养法,研究不同水浸提比对黄瓜、樱桃萝卜及大白菜种子发芽特性指标（相对发芽率、相对根长、发芽指数）的影响。结果表明,黄瓜种子的相对发芽率在不同水浸提比下均大于80%;其他种子发芽特性指标随水含量的增多,均经历了明显的增大趋势。同一种子,相对根长受水浸提比的影响比相对发芽率显著,发芽指数与相对根长随水浸提比的变化规律一致。新鲜猪粪经堆肥处理对种子的植物毒性减轻,大白菜种子对猪粪及其堆肥的植物毒性较黄瓜种子与樱桃萝卜种子敏感。

Effects of Water Extraction Ratio of Pig Manure and Its Compost on Seed Germinative Indicators

Seed germination test is one of common methods to evaluate compost maturity for further land application.In this paper,we studied the effect of pig manure and its compost on seed germinative indicators of different vegetable seeds（cucumber,cherry radish and Chinese cabbage） at a series of water extractive ratios（1：10,1：20,1：30,1：40,1：50,1：60,W/V）.The results showed that the seed germinative indicators experienced a rapid increasing stage during the water extractive ratios of 1：10~1：60.However,the relative germination percentage of cucumber seeds,more than 80% at all experiments,was slightly affected by the water extractive ratios.The changes of germination index with water extractive ratios were in agreement with that of relative root elongation,meanwhile the relative seed germination was less obviously affected by water extractive ratios than relative root elongation.By comparison,the composting of pig manure could reduce its phytotoxicity,and Chinese cabbage was most sensitive to phytotoxicity.