Long-term effects of fertilization and weather on corn yields in a clay loam soil in northeast China
2008
Peng Chang | Gao Hongjun | Niu Honghong
chinois. 本试验以公主岭国家黑土监测基地为平台，研究玉米连作条件下施肥及气候因素对产量的可持续性影响。试验共设有机肥和化肥N、P、K的不同组合共24个试验处理。结果表明，与不施有机肥相比，施用常量有机肥和高量有机肥（FYM1、FYM2）均可以显著提高玉米产量，产量分别达到7668kg／hm. 和7925kg／hm. ，FYM（无有机肥）处理为5718kg／hm. 。有机肥配施化肥比单施化肥也有明显的增产作用，施用N肥165kg／hm. 可以显著增加玉米产量，单施磷素、钾素及磷钾配施增产作用不明显，表明土壤中的磷钾营养水平没有限制作物产量。降雨量与产量的相关分析结果表明，磷、钾处理的产量与8月份的降雨量显著相关。[著者文摘]
Afficher plus [+] Moins [-]anglais. A long-term monocuhure corn experiment was established at Gongzhuling, China, to study the sustainability of com grain yield under the conventional management. Twenty-four treatments consisting of different compositions of chemical N, P, K, and farmyard manure （FYM） were included. Farmyard manure treatments produced more com grain yields（7 668 kg/ha and 7 925 kg/ha in FYM1 and FYM2） compared to that of non-FYM treatment （5 718 kg/ha）. The application of 165 kg N/ha increased grain yield significantly, but the addition of P, K or PK gave no significant response, suggesting that the soil supply of these nutrients did not limit com yield. Com grain yields in- creased and remained relatively constant with time in fertilized and FYM addition treatments and decreased in no-fertilizer addition treatment. Precipitation in August was proportional to com grain yields only to P and K treatments. Adequate application of fertilizer and FYM can sustain monocuhure com production.
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