论文部分内容阅读
近１～２年来，葫芦岛地区发展冬麦的势头很猛，１９９８～１９９９年度冬麦播种面积全市约有５２００ｈｍ２。其中，建昌县由１９９７～１９９８年度的１３．３ｈｍ２增加到１０００ｈｍ２。发展以冬麦为前茬的复种形式是充分利用当地光热资源，一茬变两茬或两年三茬，提...
In the past 1-2 years, the development of winter wheat in Huludao is very fierce. There are about 5200hm2 of sown area of winter wheat in 1998-1999 in the city. Among them, Jianchang County increased from 13.3hm2 in 1997 to 1998 to 1000hm2. The development of winter wheat as the stubble in the form of multiple crop is to make full use of local light and heat resources, crop stubble change two or three years ...