摘要
研究结果表明，不同培肥途径多年产量的平均结果较对照增产．农肥不仅提供作物所需养分．并显著地提高土壤生态系统稳定性．化肥高量区与低量区产量的平均结果变动幅度较小．干旱少雨年份，农肥作用大于化肥；雨量充沛年份，化肥的作用大于农肥．秸秆还田量在一定地区有一定上限，过高会出现负效应，加剧了干旱程度，配施农肥、化肥能够缓冲这种负作用、并定量地给出高产的最适施肥配比．
Based on the theory of agriculture ecosystem and by using the rotation design mathemat ics method which takes the combination design as its theoretical basis,with superiority of the computer in analyses and graphs-showing,the relationship of experiment factors with crop yields is analyses.The result shows that the average yield of many years is higher than the contrast.Farmyard manure can not only provide nutrients mr the crop needed but also improve the stability of the soil ecological system ,Average yield of the highest chemicial fertilizer regions and the lowest regions changes slightly.In drought years,contribution of farmyard manure is greater than that of chemicial fertilizer, in years with sufficient rain,the contribution of chemicial fertilizer is greater than that of farmyard fertilizer. It shows the characteristies of available fertilizer.Too much amount of straw returning to the field will result in negative effeet,The straw aggravates dry degree specially in dry years,with farm yard manure and chemicial fertilizer. this negative effect can be buffered.This study show quantitive optimum fertilizer proportion of getting highest yields.
出处
《东北农业大学学报》
CAS
CSCD
1996年第1期34-39,共6页
Journal of Northeast Agricultural University
