Combining compost with urea: Nitrogen and phosphorus recovery by cabbage and leaching under imposed high rainfall condition in the greenhouse

Scientific Research and Essays

Keshav Raj Adhikari¹ 

关键词:  ;    Composted manure;    urea;    nitrogen and phosphorus recovery;    leaching;    fertilization.;   

DOI  :  10.5897/SRE10.828

学科分类：社会科学、人文和艺术（综合）

来源: Academic Journals

【 摘 要 】

Data from one cabbage growing season was used to comparenitrogen (N) and phosphorus (P) recovery and leaching between independent andcombined applicationofcomposted manure and urea in the greenhouse. Treatments included: chemical-fertilizer (NPKat250:80:150 kg ha-1, respectively), organic-fertilizer (250 kg N from 16 Mg ha-1of compost), low-combination (125 kg N from urea and 125 kg N from 8 Mg ha-1of compost), high-combination (double of low-combination), and a blank control. Nitrate-N (NO3) and inorganic water soluble P (WSP) leachingwere monitored fortnightly. Organic and chemical fertilizer treatments suffered from demerits of low N recovery (9.34%) and high NO3leaching (27%), respectively. While cumulative NO3leaching loads in both low-, and high-combination treatments were low, high-combination treatment demonstrated greater numismatic quality by outperforming low-combination treatment by higher retention and uptake of N and P. Taking into account the prevailing environment the soil represents to,16 Mg ha-1ofcompostco-applied with 250 kg urea-N appears to be more appropriate combination for cabbage growth. Although WSP leaching was negligible, water quality benefits from this compost application does not seem to be promising, especially because other forms of P leaching (organic and/or inorganic) was suspected which warrants further study.

【 授权许可】

CC BY