论文部分内容阅读
我区紫云英最高年份种植面积达330万亩,占水田面积的80％多。七十年代后期产量有所下降,多数地方大面积由过去的5000～6000斤下降到2000～3000斤,面积也减至230万亩左右,这种状况对粮食生产地区无疑是一个值得非常重视的问题。 一、减产原因 概括起来主要有如下几个方面: (一)管理粗放,生长不良 我区紫云英栽培有几十年历史,各地早已推广应用以磷增氮等一系列科技成果和先进栽培技术,不少地方并已形成一套高产稳产的栽培技术经验。但是,近十多年来,这些有效的栽培技术在不少地方没有继续应用,管理也甚为粗放。如上饶市郊有些田块,排水不良,紫云英株高只有46.1公分,根部有效掌状、棒状大根瘤只有10.3个,粒状小瘤也只有45
My area of the highest year of Aspen Yun planted area of 330 mu, accounting for more than 80% of the paddy field area. The output in the late seventies has declined. In most places, the area has dropped from 5,000 to 6,000 kilos in the past to 2,000 to 3,000 kilos and the area reduced to about 2,300,000 hectares. This situation undoubtedly deserves great attention to the grain-producing areas problem. First, the reasons for the reduction can be summed up in the following aspects: (A) extensive management, poor growth Myrrh culture in our region for decades, many have been promoting the application of phosphorus and nitrogen by a series of scientific and technological achievements and advanced cultivation techniques Many places have formed a set of high-yield and stable cultivation techniques. However, in recent ten years, these effective cultivation techniques have not been applied in many places and their management is very extensive. Such as Shangrao suburbs of some plots, poor drainage, Ziyunying Zhuang only 46.1 cm, the effective root of the palm-like, rod-shaped large nodules only 10.3, granular tumor only 45