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桐梓县有中低产旱地 1.5万hm2 ,其中一年一熟制 1.4 96万hm2 ,由于农户投入不足 ,产量在 2 5 0kg/ 6 6 7m2左右徘徊。为了提高玉米产量 ,从 1999～ 2 0 0 2年 ,进行了油菜鲜草还土试验示范 ,培肥了地力 ,玉米产量从 2 72 .33kg/6 6 7m2 ,提高到 36 0 .6 7kg/ 6 6 7m2 ,增产 32 .4 4 %。以油菜作绿肥改良中低产旱地 ,值得推广。
Tongzi County has 15,000 hm2 of low and middle-yield dry land, of which 19,960 hm2 is one-year cooked. Due to inadequate investment by farmers, the output hovers around 250kg / 667m2. In order to increase the yield of maize, from 1999 to 2002, the experiment of returning fresh soil to rape with soil was carried out to fertilize and fertilize the soil. The yield of corn increased from 72.233kg / 667m2 to 36.067kg / 6 6 7m2, an increase of 32.44%. Rape as a green manure to improve low-yield dry land, it is worth promoting.