CAJ | 학술논문

大田试验条件下,研究了5个不同形态氮素比处理水平对马铃薯体内氮素分布、块茎形成期的光合参数以及收获期的干物质量和产量的影响.结果表明:铵态氮和硝态氮的比例为3∶9时,植株体内氮素含量及块茎中的氮素含量在成熟期最高,分别为21.77 mg·g~(-1)和19.10 mg·g~(-1);光合速率与气孔导度均随着铵硝比下降而升高,单施硝态氮时,光合速率为20.33 μmol·m~(-2)·s~(-1),气孔导度为342.00 mmol·m~(-2)·s~(-1),胞间CO_2浓度为224.67 μmol·mol~(-1);铵硝比为3∶9时,马铃薯产量最高,为26.08 t·hm~(-2),较对照增加了28.1 %.
대전시험조건하,연구료5개불동형태담소비처리수평대마령서체내담소분포、괴경형성기적광합삼수이급수획기적간물질량화산량적영향.결과표명:안태담화초태담적비례위3∶9시,식주체내담소함량급괴경중적담소함량재성숙기최고,분별위21.77 mg·g~(-1)화19.10 mg·g~(-1);광합속솔여기공도도균수착안초비하강이승고,단시초태담시,광합속솔위20.33 μmol·m~(-2)·s~(-1),기공도도위342.00 mmol·m~(-2)·s~(-1),포간CO_2농도위224.67 μmol·mol~(-1);안초비위3∶9시,마령서산량최고,위26.08 t·hm~(-2),교대조증가료28.1 %.
The nitrogen distribution of potato,photosynthetic parameter of tuber initiation stage,amount of dry matter and yield treated with five NH_4~+/NO_3~- ratios of different stage were investigated in field experiment.The results indicated that when NH_4~+/NO_3~- ratio was 3∶9,the N content in both the plant and the tuber at the mature stage was the highest,being to 21.77 mg·g~(-1) and 19.10 mg·g~(-1) separately.Both the photosynthetic rate(Pn) and the cond(Gs) increased,with the ratio of the NH_4~+/NO_3~- decreasing.When only NO3--N was used,the photosynthetic rate(Pn) was 20.33 μmol·m~(-2)·s~(-1),the cond (Gs) was 342.00 mmol· m~(-2)·s~(-1) and the Ci was 224.67 μmol·mol~(-1).When NH_4~+/NO_3~- ratio was 3∶9,the highest yield was 26.08 t·hm~2,increasing by 28.1 %.NH_4~+/NO_3~- ratio had an effect on growing and yield of the potato.The best NH_4~+/NO_3~- ratio was 3∶9 in contrast to CK.