喀布尔动物园并非动物的避难所     

Abdul  Baseer  Saeed  宋燕波 《绿色中国(综合版)》2005,(10):49-49

在阿富汗首都喀布尔的西南部，在飞扬的尘土和战后满目疮痍的城市里，幸运地保留着一块绿树葱茏的清凉绿洲，那就是喀布尔动物园。然而，动物园里并非一派安宁平和，那儿的动物对它们的生存状况极其愤怒，管理员们同样也很生气。  相似文献   

Substituting urea by organic wastes for improving maize yield in alkaline soil     

Baseer Muhammad  Muhammad Adnan  Fazal Munsif  Muhammad Saeed  Fazli Wahid 《Journal of plant nutrition》2013,36(19):2423-2434

Abstract

Nitrogen (N) deficiency is a very common problem of alkaline soils. Incorporation of organic residues with urea could be promising practice for improving soil properties and crop yield. This study was aimed, to evaluate the responses of two maize cultivar (Azam and Jalal) to organic wastes and Urea (sole organic residues i.e. seed cake (SC), poultry manure (PM), press mud (PrM) and mineral nitrogen (urea) and their combinations with urea (25%, 50% or 75%) applied at 150?kg N ha^?1 under field conditions. Significant differences were recorded for leaf area index, plant height, number of grains ear^?1, 1000 grain weight, biological and grain yield to N sources. Maize cultivar Jalal performed significantly better than Azam for all tested traits. The performance of both cultivars was significantly better when N was applied as either SC/PM with urea at 25:75, SC and PM with urea at 25:25:50, 100% sole urea, SC/PrM with urea at 50:50, or all organic N sources (25%) with urea (75%). Integration of organic wastes with urea gave the higher maize yield however, it was similar to the yield obtained from sole urea but due to allied environmental and health hazards, the sole use of urea could not be encouraged.  相似文献