碳管理:盐土治理的一种新思路

Carbon Management:A New Approach to the Governance of Saline Soils

江苏人多地少,沿海滩涂盐碱地是其主要的土地后备资源,滩涂盐碱地开发利用的前提是盐土的快速降盐。笔者从碳管理的角度综述了盐土治理方面的研究成果。盐土改良的3个技术措施为耐盐植物、改进土壤SOC库的农艺技术以及可溶性盐的淋溶,而重要的农艺技术包括粪肥、作物残茬管理、建立人工林、农林系统、多年生禾草与饲草、营养综合管理等。最后,笔者对江苏沿海滩涂盐土改良与耐盐作物研究策略作了简单的讨论。

Coastal shoal saline-alkali land is the main reserve land resource of Jiangsu Province which has alarge population and relatively little arable land. The prerequisite of the exploitation and utilization of coastalshoal saline-alkali land is reducing salt content. The author summarized the research results of saline-alkalisoils governance from the perspective of carbon management. Three technological options for the improvementwere salt tolerant plants, agronomic techniques to improve SOC pool and the leaching of salts. The importantagronomic techniques were manure, crop residues management, artificial forest establishment, agroforestrysystem, perennial grass and forages growth, nutrition integrated management and so on. At last, investigationstrategies for the reclamation of saline-alkali land and salt tolerant crop plantation were briefly discussed inthe paper.