The yield-increasing and slowly releasing effects of palygorskite coated fertilizer were investigated with pot experiment.The result showed that application of diammonium phosphate coated with palygorskite at 225 kg·hm-2,the effective siliquae and yield of rape(Brussica napus) increased by 2.27 % and 255.33 % respectively compared with control.The biomass of wheat which planted after rape increased by 57.67 % when compared with control at 300 kg·hm-2.The content of chlorophyll,protein and soluble sugar in rape at latter growth stage were higher than that of the control,while MDA content was lower.It is suggested that palygorskite coated fertilizer shows good anti-aging and adverse-resistance characteristics,it also has certain slow release property on diammonium phosphate.

Spring wheat pot experiments were used to study the slow release effect and mechanism of palygorskite coated fertilizer. The results show that palygorskite coated phosphorus helps to make a slow release of fertilizer, to increase the weight per 1 000 grains, the economic coefficients, the economic yield, and the biomass of spring wheat, and to promote the transformation of biochemistry matter in spring wheat and the delayed aging. Therefore, palygorskite can be used as a new type of slow -release fertilizer coating materials in production.

Palygorskite is a new ecological function material with good water retention property, absorbability and slow-releasing effect, so it has wide application prospect in agriculture. To understand its water-retention and yield-increasing effect, the experiment has been made on potato. The combined application of palygorskite, water retaining agent and nutrition fertilizer could effectively increase the indexes of potato in plant height, weight of stem and leaf, and tuber yield based on both plant and unit area. They also could improve its quality. Application of only palygorskite could increase the yield by 21.55% compared with control, and application with nutrition fertilizer could increase yield by 36.62%～51.28%. Palygorskite also showed good effect of water-retention and increasing water use efficiency. Therefore, it can be used as new ecological function material in eco-agricultural construction.