浙江衢州地区种植鲜食毛豆的茬口以秋延后为主,不仅可延长鲜食毛豆的供应期,实现产品均衡供应,而且可错开"双抢"农忙时节,有效缓解劳动力紧张,还可错开鲜食大豆销售旺季,提高经济效益.该文从品种选择、整地施肥、播种、田间管理、病虫害防治、采收等方面介绍了衢州地区秋延后鲜食毛豆的高产栽培技术.

Carbon in agricultural soil,an important part of the surface carbon reservoir,has important significance to carbon cycle of the terrestrial ecosystem.Rice soil is a major type of agriculture,and thus studies on its carbon fixation have practical significance to carbon cycle.Based on data obtained during the three investigations on surface soils of Jiashan county,the carbon and nitrogen contents and distribution are analyzed.The results show that the average organic carbon decreases from 1980s to 2002,but slightly increases from 2002 to 2008.The average total nitrogen from 1980s to 2002 also declined,followed by a rapid rise from 2002 to 2008.The surface soil organic carbon and nitrogen average density is 44.36 tc·hm-2,5.3 t·hm-2;average capacity is 2.182 kg·m-3and 2.67 kg·m-3,as shown by high-density grid(1 point/4 km 2)sampling results obtained in 2008,and correspondingly,total reserves of 1.122×109kg and 0.135×10 9kg,respectively.The spatial changing rates of organic carbon and nitrogen in the surface soil from 2002 to 2008 were calculated using GIS data and statistics tools.The average annual rate of carbon storage is 30.8 kg·hm-2,that for nitrogen is 156 kg·hm-2.From 2002 to 2008,the average ratio of C/N dropped by 2.3.On the basis of the soil grain grade Hassink data and the carbon keep capacity formula,the average capacity of carbon fixation has been calculated,the results show that the average fixation capacity for Jiashan soil is 2.478%,and preliminary estimate the surface soil also has the potential of 0.42 million tons of carbon sequestration.The most important factors affecting surface organic carbon storage are soil moisture and texture.

Aimed at tackling the stochastic variations caused by non-artificial natural factors and accidental factors such as nonpoint source contamination and point source contamination in geochemical maps for different continental and sea media of eastern Zhejiang coastal area,this paper puts forward a geochemical map formation method for different continental and sea media based on a suitable data-processing model and color area spatial distribution so as to improve the map face effects.