福州地区7年生柑橘果园生态系统的碳氮储量

Organic carbon and nitrogen storage in 7 years old citrus orchard ecosystem in Fuzhou,China

通过野外实地调查对福州地区林龄7年的柑橘果园生态系统碳氮储量及分布特点进行了研究,结果表明:有机碳储量为158.282 t.hm-2,其中土壤(0-100 cm)碳储量为151.734 t.hm-2,占总有机碳储量的95.86%,植被碳储量为6.548 t.hm-2,占4.14%;氮储量为14.602 t.hm-2,其中土壤(0-100 cm)氮储量为14.399 t.hm-2,占总氮储量的98.61%,植被氮储量为0.203 t.hm-2,占1.39%.相关分析表明,柑橘果树不同器官碳氮含量呈极显著负相关(r=0.976),不同土层土壤的碳氮含量呈极显著正相关(r=0.998).

Organic carbon and nitrogen storage in 7 years old citrus orchard was detected with the field investigation and measure- ment. The results showed that carbon storage in the ecosystem was 158.282 t · hm^-2 , in which soil （0 - 100 cm） carbon storage was 151.734 t · hm^-2, vegetation carbon storage was of 6.548 t · hm^-2, accounting for 95.86% and 4.14% of total carbon storage, respectively. Nitrogen storage in the ecosystem was 14.602 t · hm^-2 , in which soil （0 - 100 cm） nitrogen storage was 14.399 t · hm^-2 , vegetation nitrogen storage was 0.203 t · hm^-2, accounting for 98.61% and 0. 203% of total nitrogen storage, respectively. According to the correlation analysis, carbon and nitrogen contents in different organs were significantly negatively correlated （r = 0.976）, and soil organic carbon and nitrogen contents in different soil layers were significantly positively correlated （r = 0.998）.