摘要
1983—1984年进行大豆开育8号生育期间的氮、磷、钾吸收动态,养分浓度(百分含量)及施肥对养分和产量影响的研究。单株各器官氮、磷、钾积累有相似的动态。叶片和叶柄积累高峰比茎秆和根系提早10—15天(在盛花期)。各营养器官中的养分浓度苗期最高,以后各期逐渐降低。各器官氮、磷、钾所占的比重在不同时期有所不同。施氮肥和氮、磷肥配合施用能影响体内的养分浓度,尤其是氮、磷肥配合效果更大。试验结果表明,盛花至结荚期是花荚吸收养分速率最大的时期。初花期配合施用氮、磷肥具有明显的增花保荚作用。
N,P,K uptake and accumulation trends,fertilizer response to the nutrient and outputof soybean at each growth stage were studied in 1983—1984.The N,P,K accumulationsin the different parts of soybean plant are similar.The accumulation peaks in the leavesand petioles are earlier(about 10—15 days at full-bloom stage)than that in stem androot.At seedling stage,nutrient concentration of each part is all highest,then reduces gra-dually.The N,P,K proportion of parts varies at different growth stages.Fertilization can increase accumulation of dry matter,nutrient concentration,especial-ly mixed fertilizer with N and P.From full-bloom to seed-filling period,the nutrient up-take rate of flower-pod is most rapidly.At the beginning of flower period mixed fertilizerwith N and P has striking function for increasing flower and protecting pod.
出处
《作物学报》
CAS
CSCD
北大核心
1989年第2期167-173,共7页
Acta Agronomica Sinica
关键词
大豆
营养
施肥效果
Soybean nutrition
Soybean fertilizer
