论文部分内容阅读
对四个不同类型的玉米品种的根系分布动态及其干物质积累进行了研究。结果表明:玉米的根系分布具有相似的规律,在土壤中的垂直分布:在0～40cm耕层占总根量的50%～60%,41～70cm占25%～30%,71cm以下深层相对较少;在土壤中的水平分布:以株为中心由里向外逐渐减少,1/4行距处为40%～45%,1/2株距处为25%～30%,1/2行距处为20%～25%;但不同类型玉米品种也各有特点,掖单22的根系相对比较集中,可以减少行距和株距,增加密度;豫玉22根系分布比较分散,利于充分利用水肥条件,具有较强的抗旱性;登海9号和农大108根系垂直分布比较集中,水平分布均匀,根系在后期比较强壮,必须提供足够的水肥,并适当延长生长期,才能发挥其潜力。
The root distribution dynamics and dry matter accumulation of four different types of maize cultivars were studied. The results showed that the root distribution of maize had a similar pattern with vertical distribution in the soil: 0 ~ 40cm plow accounted for 50% ~ 60% of the total root volume, 41 ~ 70cm accounted for 25% ~ 30% Less; horizontal distribution in soil: the center of the strain decreased gradually from inside to outside, 1/4 to 40% to 45%, 1/2 to 25% to 30%, 1/2 20% ~ 25%. However, different types of maize varieties also have their own characteristics. The root system of Yedan 22 is relatively concentrated, which can reduce the row spacing and spacing and increase the density. The root distribution of Yuyu22 is relatively scattered, which is conducive to making full use of water and fertilizer conditions, Strong drought resistance; Denghai 9 and Nongda 108 root system vertical distribution is more concentrated, horizontal distribution, the root system is relatively strong at the late, must provide adequate water and fertilizer, and appropriate to extend the growth period, in order to play its potential.