New Cropping Strategy to Reduce Chemical Fertilizer Application to Silage Corn Production Using Subterreanean Clover Reseeding
New Cropping Strategy to Reduce Chemical Fertilizer Application to Silage Corn Production Using Subterreanean Clover Reseeding
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利用地下三叶草补种减少青贮玉米生产中化肥施用的新种植策略
DOI：
10.4035/jsfwr.37.1
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
M. Komatsuzaki
中科院分区：
文献类型：
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作者：
M. Komatsuzaki
本试验旨在评价不同化学施氮水平下补播亚三叶草对青贮玉米生长、氮素积累及土壤氮素变化的影响。在0、50和100kg N hm -1施氮水平下，比较了三叶草补种管理和休耕处理与青贮玉米DM和N积累量的关系。试验在两个地点进行，一个在6月播种免耕玉米，另一个在7月播种常规玉米。在两个试验点，三叶草复播制度下玉米的DM积累量均显著高于休闲制度。基于这种相关性，三叶草次补种对免耕和常规耕作玉米的氮素供货量分别为108和88kg N hm -1。然而，本试验对三叶草N供应的评价受三叶草N的影响明显，其他年份的产出也很明显。因此，这些结果也表明三叶草次补播系统有提高土壤全氮的可能性。然而，每年的亚三叶草氮供应量仍不清楚，因此需要进一步的研究。
This study was conducted to evaluate the effects of reseeding sub clover as a cover crop on silage corn growth, nitrogen accumulation, and the changes in soil nitrogen under different chemical nitrogen application levels. The cropping systems of sub clover reseeding based management and fallow treatment were compared to DM and N accumulation of silage corn at 0, 50, and 100kg N ha-1 application levels. The experiment was conducted at two sites, one where no-till corn was sown in June, and the other where conventional corn was sown in July. DM accumulation of corn in the fields of sub clover reseeding system was significantly higher than in the fields of fallow system at both sites. Based on this co-relationship, the amounts of nitrogen supplied by sub clover reseeding to no-till and conventional tilled corn estimated to be 108 and 88kg N ha-1, respectively. However, the evaluation of sub clover N supply in this experiment was obviously influenced by sub clover N that was also produced other years were obvious. So these results also suggested that there is some possibility to increase the soil total nitrogen in the field of sub clover reseeding system. However, the amount of sub clover N supply per year is still not clear, so additional research is needed.