河北棉花主产区气候、土壤适宜性评价

《河北棉花主产区气候、土壤适宜性评价》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、3.2.5优势棉花类型划分···························································································153.3气候土壤地球化学因子对棉花品质的影响··································································183.3.1气候因子对棉花纤维品质的影响·········································································183.3.2土壤地球化学

2、元素对棉花纤维品质的影响·····························································213.3.3影响棉花品质主导因子分析···············································································223.4优质棉花气候土壤地球化学适宜性评价·····································································233.4.1气候条件···························

3、···········································································233.4.2土壤养分条件································································································26结论················································································································

4、······31讨论·························································································································1参考文献····················································································································2作者简历···········································

5、·········································································6河北棉花主产区气候、土壤适宜性评价引言棉花是河北省的主要经济作物。近二十年来棉花种植面积基本稳定在3335～26003km之间，产量占河北省经济作物总产量的90％以上。作为我国的农业大省和棉花主产区，保证棉花产量和优良品质对保证我国和河北省棉纺织工业需求具有重要的经济和社会意义。另外，随着中国加入WTO，中国农业与国际市场也逐渐接轨，市场对棉花的需求不单单体现在产量上，而是在保证粮食产量的基础上提高品质。为了适应高端纺织业的要求，改良和提高棉花纤维

6、品质已成为当前棉花育种和栽培的重要目标。棉花纤维品质的表型除受品种固有的遗传特性控制外，还受多种环境因素的综合影响，同一棉花品种在不同的地点种植，其纤维长度、比强度、麦克隆值及纺纱均匀指数存在明显的差异，主要受生态环境的影响。农业生态地球化学是以农业生态系统为对象，研究地球表层介质中化学元素及化合物对作物生长发育所产生的影响和最终效果。如开展名、优、特产品地球化学特征调查，进行农业地质环境适宜性研究。农作物适宜性研究的原理是生态位理论，生态位又称―小生境‖，是指作物生存所必须的或可被其利用的各种生态因子或关系的集合。比如，影响棉花品质的多种生态地质地球化学因子的集合被称作棉花适生生态位的生态地

7、质地球化学环境比配模式，是棉花品质区划的依据。因此，提高棉花纤维品质，除了加强品种改良与创新外，对棉花主产区气候、土壤适宜性进行评价，为棉花品质进行生态地质地球化学分区，实行区划种植提供理论依据，从而提高棉花品质，生产多种品质类型的原棉，以适应纺织工业对原棉的多层次需求。1河北农业大学非全日制专业硕士学位论文1文献综述随着农业地质调查项目的启动，国内多个省市在农业地质多目标调查的基础上，针对区域作