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作 者 ：孙利军,张仁陟,黄高宝,蔡立群.

期 刊 ：中国生态农业学报 2008年 16卷 5期 页码：1122-1126

关键词：保护性耕作；生态适应性；黄土高原半干旱区；层次分析法；

Keywords:Conservation tillage, Ecological adaptability, Loess Plateau semi-arid areas, Analytic hierarchy process (AHP),

摘 要 ：在黄土高原半干旱区连续4年保护性耕作试验的基础上，利用层次分析法，对5种保护性耕作法与传统耕作法适应性（生态与经济）进行综合评价,探究适合黄土高原半干旱区的保护性农业技术体系。结果表明:在两种轮作次序（小麦／豌豆、豌豆／小麦）、两种投入方式(计秸秆和不计秸秆)下，保护性耕作法免耕秸秆覆盖（NTS）综合适应性指数（PI）均显著高于其他几种耕作方式，且PI在0.76～0.86之间，是传统耕作法（T）的2～2.5倍，NTS在该地区的适应性最强；NTS、免耕不覆盖（NT）、免耕结合地膜覆盖（NTP）３种耕作方式的PI高于传统耕作结合秸秆还田（TS）、T、传统耕作结合地膜覆盖（TP），说明NTS、NT、NTP在该区的适应性优于TS、T、TP。因此,在黄土高原半干旱区实施保护性耕作措施NTS,更能促进该区农业的持续发展。

Abstract:To explore the adaptability of conservation tillage in the Loess Plateau semi-arid areas of Gansu Province, a conservation tillage experiment was conducted for 2001 ~ 2005 and the Analytic Hierarchy Process (AHP) used to evaluate the economic and ecological suitability of five conservation tillage methods. The economic and ecological adaptability evaluation shows that no-tillage with straw cover (NTS) is the best among the tillage methods investigated. NTS adaptability ratio (PI) is far higher than the other tillage methods, ranging from 0.76 to 0.84 , which is 2 ~ 2.5 times ordinary tillage (T), showing that NTS treatment is more adaptable to the local ecology. PIs for NTS, no-tillage (NT) and no-tillage with plastic cover (NTP) are higher than that for tillage with straw cover (TS), T and tillage with plastic cover (TP). This implies that the adaptability of NTS, NT and NTP is better than that of TS, T and TP. Hence adopting NTS not only increases crop yield or reduces total input, but also enhances sustained development of agriculture in the Loess Plateau semi-arid areas of Gansu Province.

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