Abstract: A field comparison experiment was conducted to analyze the effects of different mulching materials as non-woven fabric and plastic film on the main meteological factors including temperature,light intensity and humidity, meanwhile, the relationship between rice seedling quality and the changes of main meteological factors under mulching was investigated. Three early rice varieties were selected and cultivated under non-woven fabric and plastic film for three years in order to measure the temperature, light intensity and humidity and determine the seedling quality as well. The results showed that the thermal insulation performance and permeability of non-woven fabric was good, so the temperature changed little under mulching. The highest temperature under non-woven fabric mulching was 21.9 ℃ lower than that under plastic film mulching, thus there was little seedling sunburn occurred under non-woven fabric mulching. The relative air humidity under non-woven fabric mulching was 11.7 % lower than that under plastic film on average, and the maximum value of relative air humidity was 25.7% lower. The changes of light intensity indicated as atmosphere>plastic film>non-woven fabric, and the light intensity in sunny days was 70% and 63% of atmospheric light under plastic film and non\|woven fabric, respectively. Compared with the mulching of plastic film, the seedling rate was higher, and the root dry weight increased by 16.7%-38.8% and the dry weight of aerial parts increased by 10.2%-21.1%, furthermore, the occurrence of disease was quite lower under non-woven fabric mulching. The relative advantages of non-woven fabric mulching techniques were identified, and the problems needing attention in use of non-woven fabric mulching were also discussed．

Key words: early rice, seedling raising, ecological factor, seedling quality