阿坝藏族羌族自治州耕地玉米种植适宜性评价

Adaptability Evaluation of Maize in Aba Tibetan & Qiang Autonomous Prefecture

以四川省阿坝藏族羌族自治州为研究对象,选取海拔、积温、灌溉保证、耕层厚度、碱解氮、有效磷和速效钾7项适宜性评价指标,基于"县域耕地资源管理信息系统V4.0软件"建立层次分析模型进行玉米的耕地适宜性评价。结果表明:阿坝藏族羌族自治州高度适宜区的耕地面积有1.83万hm^2,占耕地总面积的22.38%;适宜耕地面积为2.49万hm^2,占耕地总面积的30.42%;勉强适宜区耕地面积为2.33万hm^2,占耕地总面积的28.48%;而不适宜区耕地面积为1.53万hm^2,占耕地总面积的18.72%。另外,全州高度适宜区和适宜区以茂县的分布面积最大,达0.84万hm^2,其次为九寨沟县和小金县,其分布面积分别为0.65万hm^2和0.64万hm^2;红原县仅有的0.01万hm^2耕地均不适宜种植玉米。

This study evaluated the cultivated land suitability of maize in Aba Autonomous Prefecture, SichuanProvince. The altitude, accumulated temperature, irrigation guarantee, topsoil thickness, available nitrogen,available phosphorus and available potassium were evaluated by the software of＂County Land ResourceManagement Information System V4.0＂. The results indicated that the agricultural acreage of highly suitablearea was 18.3 thousand hectares, which accounted for 22.38% of the total agricultural acreage in Aba; theagricultural acreage of suitable area was 24.9 thousand hectares, which accounted for 30.42%; the agriculturalacreage of reluctantly suitable area was 23.3 thousand hectares, which accounted for 28.48%; the agriculturalacreage of not suitable area was 15.3 thousand hectares, which accounted for 18.72%. Besides, the distributionof highly suitable and suitable area in Maoxian was the highest of 8.4 thousand hectares, then was Jiuzhai andXiaojin of 6.5 and 6.4 thousand hectares respectively. The agricultural acreage of Hongyuan was only 0.1 thousand hectares, which was not suitable for planting maize.