摘要
本文系统研究了不同土壤水分条件下施肥对玉米苗期生长的影响。结果表明 :土壤水分供应不足时 ,施用氮肥可显著抑制玉米苗期的生长 ,而磷、钾肥特别是钾肥的施用则能促进玉米的生长、提高水分的利用效率和抗旱能力、达到以肥调水的目的 ;只有适宜土壤水分条件 ,才能充分发挥氮肥的肥效 ;施用钾肥可提高玉米的抗涝能力。施用氮肥能提高玉米体内的氮素含量和吸收量 ,磷、钾肥也能促进玉米对氮素的吸收 ,并且降低土壤水分状况对氮素吸收的影响。土壤相对含水量较低时 ,氮、钾肥施用可显著促进玉米对磷素的吸收 ,含水量较高时施氮则抑制磷素的吸收。在土壤水分缺乏的条件下 ,施用氮、磷肥能抑制玉米苗期对钾素的吸收 ,施用钾肥促进玉米对钾素的吸收、提高体内的含钾量。
The effects of fertilizer and soil water conditions were studied sysematicaully.The result show that in poor soil conditions,the application of N can signiticantly reduced the growth of corn seedlings and the application of P and K can greatly increase the growth of corn seedlings and also enhance the water use efficienoy and drought resistance.The results also indicate that the application of K and N are aso good for water logging condition and then K and N fortilizers were applied in poor soil water condition,the amount of p uptake by corn seedllngs was also increased;however this K uptake amount was reduced when the soil water is rich,if should be concluded that the application of N and P in poor soil condition can depress the uptake of K by corn seedings.The application of K can increase the aceumulation to K in the corn seedling plants.
出处
《山东农业大学学报(自然科学版)》
CSCD
北大核心
2002年第3期273-280,共8页
Journal of Shandong Agricultural University:Natural Science Edition
关键词
玉米
苗期
肥水耦合效应
抗旱能力
抗涝能力
interaction of soil water and fertilizers
Corn
drought resistance
waterlogging resistance