γ－射线处理城市生活垃圾的农业利用

Agricultural Use of The Gamma-Irradiated Sludge.

本文用盆栽法对γ－射线处理的垃圾对莴笋生长的影响及其机理进行了研究。结果表明，经γ－射线照射的垃圾比未照射的有更大的增产效果，这种效果在肥力低的土壤上尤为显著，但产量的提高并不随照射剂量的增加而明显增强。这是由于γ－射线能提高垃圾中有机质和氮磷钾的活性，但其活性的提高亦不随照射剂量的增加而增强的缘故。

Abstract The effects of gamma-irradiated sludge on the growth and yield of lettuce in pot cultures were studied.Compared with plants grown only in soil,yields of lettuce grown in soil supplemented with unirradiated or gammairradiated sludge were significantly increased.Irradiation of sludge resulted in much more weight of shoot than that grown in soil containing unirradiated sludge,especially in poor soil.But lettuce yield did not increase as radiation doses increased.The reason was that irradiation could increase activities of organic matter and N,P,K in the sludge The activities were not increased when radiation doses increased.