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沈阳位于东经122°25′～123°48′,北纬41°12′～42°17′,属于北温带大陆性季风气候区,年降雨量为575～685毫米,无霜期147～164天。旱田耕地面积557万亩,主要属于辽河-泻河冲击平原,仅有少部分为丘陵山地及沼泽地。境内土壤有棕壤土、草甸土、风沙土、碱土及沼泽土。旱田耕地大部分土层较厚,保水能力较强,适宜杂草繁衍生长,杂草种类较多,危害严重。为了制订农田杂草综合防除措施,几年来我们对沈阳地区旱田杂草的种类进行了调查,并对几种主要杂草发生消长规律进行了观察。
Shenyang lies between 122 ° 25 ’and 123 ° 48’ east longitude and 41 ° 12 ’~ 42 ° 17’ north latitude, belonging to the northern temperate continental monsoon climate zone with annual rainfall of 575-685 mm and frost-free period of 147-164 days. Dry farmland 557 acres of arable land, mainly belonging to the Liaohe - River flood plain, only a small part of hilly mountains and marshes. The territory of the soil brown soil, meadow soil, windy soil, alkaline earth and swamp soil. Dry soil most of the soil is thick, strong water retention capacity, suitable for the growth of weeds, weeds species more serious harm. In order to formulate a comprehensive control measures for weeds in farmland, we investigated the types of weeds in dry land in Shenyang in recent years and observed the growth and decline of several major weeds.