摘要
西北地区光热资源丰富,耕地充足,人口稀少,增产潜力较大,有着农业持续发展的潜力。干旱少雨制约着农业生产,降雨分布不匀,植被稀少而又人为破坏严重,引起了严重的风蚀和水蚀,导致了土地退化和生态环境脆弱。要发展西北旱地农业必须以高效利用天然降水为突破口,以养分投入、培肥土壤为重点,采用科学的方法控制土壤风蚀和水蚀,退耕还林还草,发展高效产业。
On the drylands in northwest China, heat and light resources are abundant, population is relatively sparse, and land per capita is relatively sufficient. Therefore there is great potential for agriculture development. However, sparse precipitation greatly limits crop production, and uneven distribution of precipitation, low rate of vegetation coverage, and serious destruction of vegetation by human activities have caused detrimental wind and water erosion, making soil degradation and environment fragility. In order to develop agriculture sustainably, highly efficient utilization of natural precipitation will be the breakthrough, input of nutrients and fostering soil fertility are the bases, and taking scientific methods for controlling water and wind erosion, reseeding grasses and planting trees, developing highly efficient industries should be considered as priorities. The paper addresses constraints existed and the ways for development of dryland agriculture in northwest China.
出处
《干旱地区农业研究》
CSCD
北大核心
2003年第3期1-10,共10页
Agricultural Research in the Arid Areas
基金
国家自然科学基金重大项目(49890330)
重点项目(30230230)
面上项目(30070429)
国家重点基础研究发展规划项目(G1999011700)
