关键词: 城市垃圾 粗堆肥 废沙坑 土壤理化性状

Abstract:

Application of Urban Refuse Rude Compost （ URRC ） to scrap sandpit soil could help to solve municipalities＇problems related to the increasing production of waste only if soil property improve- ment and environmental conservation can be demonstrated. This study thus aimed to detect the effects of four compost levels on soil bulk density, porosity, containing water, mechanical composition, and corp. （corn, oil-sunflower, alfalfa, pacesetter） indivvidual plant properties and yield. A plot experiment was carried out on a crap sandpit in Inner Mongolia. Forty eight plots （30 m^2 each） were designed for soil and corp. Treatments were： （1）Refuse compost 0 t/hm^2 ,（2）refuse compost 75 t/hm^2, （3）refuse compost 150t/hm^2 ,（4）Refuse compost 225 t/hm^2 ;with three replicates, in a fully randomized block design. URRC was applied once at the beginning of the experiment, Bulk density reduction due to refuse rude compost ranged betweenl. 31 ＋0.09 g/cm^3 and 1.42 ＋0.10 g/cm^3during seasons, This effect was evident in 225 t/hm2 and 150 t/hm^2 plot, while soil porosity was increased between 46.42% ＋ 3.94% and 50.57% ＋ 3.36%. Soil containing water was improved. Soil aggregate stability reducced. The crap sandpit of mechanical composition, measured on four ranges, by 0 - 0.1 mm, 0.1 -- 0.25 mm, 0. 25 - 1.0 mm, 1.0 - 2.0 mm, then 〈 1.0 mm diameter soil progressively increased. Furthermore, individual plant properties were evident by the different of amounts of URRC. Crop yield was improveddue to the difference of compost, and the effect was remarkable in all treatments.

Key words: urban refuse, rude compost, the crap sandpit, soil physical chemical properties