摘要
通过平衡施肥的方法,针对不同生育时期大豆需肥规律,调节氮、磷、钾比例,筛选出适宜白浆土区连作大豆生长的氮、磷、钾配比。结果表明:氮磷钾配比为N3P4.5K4.5+N3时增产最多,增产348.1 kg.hm-2,增产率为18.6%;其次为N3P4.5K4.5处理,增产率为16.0%。氮磷钾配比为N3P4.5K4.5+N3时,鼓粒期大豆株高增加最多,比对照增加28.4%;大豆鼓粒期叶面积增加到最大,比对照处理增加93.6%。氮磷钾配比为N4P6K6时,结荚期大豆根长比对照增加12.6 cm,叶片中叶绿素含量最高。白浆土中连作大豆最好的氮磷钾配比为1∶0.75∶0.75。
We screened out the optimal ratios of nitrogen,phosphorous and potassium fertilizers by analyzing the demand pattern of fertilizer at different growth stages with the method of balance fertilization in white paste soil.The results showed that seed yield of N3P4.5K4.5 ＋ N3 and N3P4.5K4.5 treatment increased by 18.6% and 16.0% compared with N2P2K1（CK）.The plant height in N3P4.5K4.5＋N3 treatment increased by 28.4% compared with that of CK at seed filling.Moreover,the leaf area of N3P4.5K4.5＋N3 treatment increased by 93.6% compared with CK.The root length increased 12.6 cm compared with CK and the content of chlorophyll was the highest at pod bearing stage in N4P6K6 treatment.In conclusion,the optimal ratio of N,P,K nutrient was 1∶0.75∶0.75,with half of nitrogen top-dressed at R1 for continuous planting soybean in the white paste soil.
出处
《大豆科学》
CAS
CSCD
北大核心
2010年第4期659-662,共4页
Soybean Science
基金
国家科技支撑计划资助项目(2008BADA4B04-11)
黑龙江省自然基金重点资助项目(ZD200813-02)
土壤质量开放实验室开放基金资助项目(C09-2)
哈尔滨市高新技术产业专项资金资助项目(2008HG6BN030)
关键词
氮磷钾
连作
大豆
N
P
K
Continuous planting
Soybean
