N-fertilizer Effect on Spring Corn in Changwu Dry Highland

DANG Tinghui; PENG Lin; DAI Mingjun; LI Qing

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N-fertilizer Effect on Spring Corn in Changwu Dry Highland

- N-fertilizer Effect on Spring Corn in Changwu Dry Highland
- Bulletin of Soiland Water Conservation Vol. 14, Issue 6, Pages: 22-27(1995)
- 作者机构：
  
  中国科学院水利部水土保持研究所
- 作者简介：
- 基金信息：
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  CLC：
- Published：1995
- 稿件说明：
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DANG Tinghui, PENG Lin, DAI Mingjun, et al. N-fertilizer Effect on Spring Corn in Changwu Dry Highland[J]. Bulletin of Soiland Water Conservation, 1995, 14(6): 22-27.
DOI：

DANG Tinghui, PENG Lin, DAI Mingjun, et al. N-fertilizer Effect on Spring Corn in Changwu Dry Highland[J]. Bulletin of Soiland Water Conservation, 1995, 14(6): 22-27. DOI：

摘要

3年田间试验结果表明:每hm

￣2

施氮570kg

玉米产量转折点亦不太明显

用一元二次方程模拟氮肥效应曲线

正常年份最高产量点氮肥用量在403kg/hm

￣2

左右

而用对数曲线或幂函数模拟

Abstract

The experiment was arranged to apply a large scal of N-fertilizer mixed with proper P-fertilizer. The productive potentiality and effect of a small amount of N-fertilizer applied to springcorn were analysed.It was showed that the tuning point of corn yield was not clear when N-fer-tilizer applied reached to 570kg/hm2. Simulating N-fertilizer effect curve with the equation Y=A+Bx+Cx2

the amount of fertilizer applied correspond ing to the biggest yield was about403kg/hm2 in general years. The interrelation was more clear when simulated with equation of Y=A+Blnx or y=A·xB

but it did not own the maximum point of production. It indicatesthat the productive potentiality of N-fertilizer to spring corn is very high.To apply very smallamount of N-fertilizer

it not only can improve yield and achieve economic benefits clearly

butalso can improve protein content in corn seed.The effect curve of N-fertilizer and yield is differ-ent with the traditional ideas at section of small amount of fertilizer applied

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