桂西北喀斯特地区新开水田渗漏特征与效益

Characteristics and Performances of Seepage on New Open Paddy Field in Karst Regions in Northwest Guangxi

在桂西北喀斯特地区，新开水田经营4年后渗漏系数是老田的1．36～1．45倍，漏水漏肥仍很严重，经营成本增加，增加经营中的犁耙次数，可以加速犁底层的形成，减少渗漏。从投入产出来讲，新开水田前2年种植旱作（大豆或早稻），第3年开始种植水稻，既能有效降低新开田的渗漏，又能减少经营成本，获得较好的经济效益。

In karst regions in northwest Guangxi, new open the paddy field to operated the empress of 4 year to seep into the coefficient have been an old fields of 1.36-1.45 times, leaking leak the nutriment in a fertilizer to still and very operate the cost gain seriously, and if have increased to operate the inside＇s plough rake the number of times, and could accelerate the formation of the plough first floor, and have reduced to seep into. Speak from input output, new open the paddy field to have planted the drought to make（ soybean or dry rice ） the first 2 years,3 years start have planted the paddy rice, since could validate to lower new open the fields leaking, and again could reduce to operate the cost, and could acquire the very economic performance.