Effects of NH4+-N on Nitrate Accumulation and Its Mechanism of Pak-choi

doi:10.7668/hbnxb.2010.06.043

Abstract

Abstract: The effects of NH₄⁺一N on nitrogen accumulation and NRA in six genotype of pakchoi were studied by using solution culture.Meanwhile, the qualities, yield and the absorption rate of NO₃-；in root under NH₄⁺一N treatment were investigated.The results indicated that the nitrate accumulation was significantly decreased；moreover, the decrease of nitrate accumulation was caused by restraining of the absorption of NO₃-；in root, while not accelerating the metabolism of NO₃-一N.In addition, it was found that the qualities and the yield could be greatly improved by proper ratio of NH₄⁺一N and NO₃-一N, while, significantly decreased with NH₄⁺-N as the single N provider.

Key words: Pak-choi, NH4+-N, Nitrate, Nitrate reductase, Yield, Quality

CLC Number:

S634.3

CHEN Long-zheng, LIANG Liang, XU Hai, SONG Bo, SU Xiao-jun, YUAN Xi-han. Effects of NH4+-N on Nitrate Accumulation and Its Mechanism of Pak-choi[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2010, 25(6): 221-224. doi: 10.7668/hbnxb.2010.06.043.

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