摘要
采用田间小区试验方法,研究了不同施氮量对玉米产量、养分吸收量及土壤无机氮的影响。结果表明,施氮量对玉米籽粒产量有显著影响,在施纯氮0～600 kg/hm2范围内,产量随氮肥施用量的增加而逐渐增加;增施氮肥能显著增加玉米植株和籽粒的全氮含量,而对玉米籽粒的全钾、全磷含量影响不大,但降低了植株全磷的含量;氮肥施用量对各处理0～100 cm土壤层的硝态氮含量影响较大,表现为随氮肥施用量的增加,各土壤层硝态氮含量逐渐增加,硝态氮含量基本上随土壤深度而减少;施氮量对0～100 cm土壤层铵态氮含量影响也较大,但各处理间、不同土壤层间的铵态氮含量变化不明显。
In order to study the effect of N application rate on the yield,nutrient uptake of maize and inorganic nitrogen of soil,a field experiment treated with different N application rates was conducted on the southern upland in 2010.The results showed that different fertilizer treatments had greater influence on the yield of maize seed,the yield gradually increased with increasing of N application.The total N content of maize plant and maize seed obviously increased with increasing of the N application amount,but different N application treatments had little influence on the total P and total K of maize seed,and the total P content of maize plant decreased with increasing of the N application amount;different N application treatments had greater influence on the N-NO-3 content of 0-100 cm soil,the N-NO-3 content gradually increased with increasing of N application,N-NO-3 content gradually decreased with increasing of the soil depth;Different N application treatments had influence on the N-NH＋4 content of 0-100 cm soil,but the N-NH＋4 content of different treatments did not changed distinctly,and the N-NH＋4 content of different soil depths did not changed distinctly also.
出处
《西南农业学报》
CSCD
北大核心
2012年第5期1730-1733,共4页
Southwest China Journal of Agricultural Sciences
基金
2010年度公益性行业(农业)科研专项"南方山地丘陵区面源污染监测与氮磷投入阈值研究"(201003014-6)
关键词
玉米
施氮量
产量
养分吸收量
无机氮
Maize
N application rate
Yield
Nutrient uptake
Inorganic nitrogen
