农业工程学报
農業工程學報
농업공정학보
2013年
24期
244-250
,共7页
尿素%养分%包膜材料%致孔剂%温度依存性%活化能
尿素%養分%包膜材料%緻孔劑%溫度依存性%活化能
뇨소%양분%포막재료%치공제%온도의존성%활화능
urea%nutrients%coated materials%porogen%temperature dependence%activation energy
为了探讨致孔剂对植物油包膜尿养分释放特性的影响，该研究通过25、30、35℃恒温静水培养方法对植物油包膜尿素养分释放特征曲线、肥效期、温度依存性以及养分释放活化能等进行了研究。结果表明：添加致孔剂ST（淀粉）和致孔剂SB（黏土矿物）均能加快植物油包膜尿素养分释放，均能缩短肥效期，当致孔剂ST用量从0增加至5%时，肥效期从122.20 d缩短为54.76 d，而添加不同用量致孔剂SB的植物油包膜尿素养分释放特征曲线基本重合；添加致孔剂ST植物油包膜尿素温度依存性Q10随用量增加而减小，而添加致孔剂SB则随着用量增加而增大；添加致孔剂会减小植物油包膜尿素养分释放活化能，当致孔剂ST和致孔剂SB用量分别为3%、4%时，养分释放活化能分别较不添加处理减少了40.20、23.28 kJ/mol。该文可为今后致孔技术在控释肥料研制中的应用提供参考。
為瞭探討緻孔劑對植物油包膜尿養分釋放特性的影響，該研究通過25、30、35℃恆溫靜水培養方法對植物油包膜尿素養分釋放特徵麯線、肥效期、溫度依存性以及養分釋放活化能等進行瞭研究。結果錶明：添加緻孔劑ST（澱粉）和緻孔劑SB（黏土礦物）均能加快植物油包膜尿素養分釋放，均能縮短肥效期，噹緻孔劑ST用量從0增加至5%時，肥效期從122.20 d縮短為54.76 d，而添加不同用量緻孔劑SB的植物油包膜尿素養分釋放特徵麯線基本重閤；添加緻孔劑ST植物油包膜尿素溫度依存性Q10隨用量增加而減小，而添加緻孔劑SB則隨著用量增加而增大；添加緻孔劑會減小植物油包膜尿素養分釋放活化能，噹緻孔劑ST和緻孔劑SB用量分彆為3%、4%時，養分釋放活化能分彆較不添加處理減少瞭40.20、23.28 kJ/mol。該文可為今後緻孔技術在控釋肥料研製中的應用提供參攷。
위료탐토치공제대식물유포막뇨양분석방특성적영향，해연구통과25、30、35℃항온정수배양방법대식물유포막뇨소양분석방특정곡선、비효기、온도의존성이급양분석방활화능등진행료연구。결과표명：첨가치공제ST（정분）화치공제SB（점토광물）균능가쾌식물유포막뇨소양분석방，균능축단비효기，당치공제ST용량종0증가지5%시，비효기종122.20 d축단위54.76 d，이첨가불동용량치공제SB적식물유포막뇨소양분석방특정곡선기본중합；첨가치공제ST식물유포막뇨소온도의존성Q10수용량증가이감소，이첨가치공제SB칙수착용량증가이증대；첨가치공제회감소식물유포막뇨소양분석방활화능，당치공제ST화치공제SB용량분별위3%、4%시，양분석방활화능분별교불첨가처리감소료40.20、23.28 kJ/mol。해문가위금후치공기술재공석비료연제중적응용제공삼고。
Adding porogen is often used as one of the key technologies regulating nutrient release from fertilizers. Adding porogen can artificially changes the coating porosity、pore diameter size、structure close degree, then adjusting the permeability of coating and controlling the nutrient release rate. , In this paper, we studied the effect of porogens on nutrient release of vegetable oil coated urea and potentials for applying this technology for the development of controlled release fertilizer. The vegetable oil coated urea was prepared using the best surface reaction coating technology of manufacturing controlled release fertilizer in China. The mixed vegetable oil consisted of tung oil、castor oil、peanut oil、soybean oil、cottonseed oil, the coating materials were then mixed with vegetable oil and curing agent through. lateral or base jet vortex fluidized bed., resulting six percent of urea. ST and SB were used as porogens in this experiment, ST is water soluble starch, SB is easy to swell in water. The experiments were performed under the still pure water dissolving incubation. We set up three temperature gradients with 25℃、30℃ and 35℃, respectively. The refractive index method was used for analyzing the urea content in the coated urea incubation solution, the nutrient release rate and longevity of vegetable oil coated urea were computed. The effects of adding porogen on nutrient release curves、temperature dependence and nutrient release activation energy of vegetable oil coated urea were analyzed, the relationship between nutrient release from vegetable oil coated urea and the amount of porogens was developed. The results showed that adding either ST or SB accelerated the nutrient release from vegetable oil coated urea, and shorted the longevity. If the amount of ST was added as 1%、3%、5%, the longevity of vegetable oil coated urea was shorten to 29.78、60.78、67.44 days, respectively. The longevity of vegetable oil coated urea was reduced with the increased proportion of ST. The nutrient release curves of coated urea with different proportion of SB was almost identical. The temperature dependence Q10 was reduced with increased ST. However, the temperature dependence Q10 was increased with increase of SB. In addition, nutrient release activation energy of vegetable oil coated urea was decreased by adding porogen.
