北疆高产棉花根系构型与动态建成的研究  

A Study on the Distribuding Pattern and Construction of High-yield Cotton Root System in North Xinjiang

作　　者：李少昆[1] 王崇桃[1] 汪朝阳[1] 张旺锋[1] 

机构地区：[1]石河子大学新疆作物高产研究中心,石河子832003

出　　处：《棉花学报》2000年第2期67-72,共6页Cotton Science

基　　金：国家自然科学基金资助项目!(39760040)

摘　　要：在大田条件下 ,研究棉花根系构型分布和动态建成结果表明 ,北疆高产棉花根系生物量的积累呈 S型曲线 ,其中线性增长期从 6月下旬 (盛蕾期 )至 7月下旬 (盛花期 ) ,较地上部相应时期早约 1 0 d。随种植密度的增大 ,根系生长率下降、快速生长期提前。根系在土壤中的下伸过程呈 S型曲线 ,构型分布符合 Y =Ae- Bx指数方程 ,有52 .4%、65.8%和 73.3%以上的根量分别集中在地表 2 0 cm、30 cm和 40 cm深的土层内 ,80 .6%以上的根量集中在植株行间两侧 0～ 1 5cm土体内。与内地棉区相比 ,北疆棉花根量小 。This paper deals with the distribution pattern and construction of high yield cotton in North Xinjiang under field condition.The results showed as follows:the accumulative tendency of root system biomass is S shaped.The fast growing stage is from full squaring to peak flowering stage, which is about 10 days earlier than that ofthe above ground parts,The Root growth fast stage advanced and its rate is decreased with increasing of planting density.Stretching down of root system in soil is in keeping with the Logistic equation. The vertical distribution of root system fit a reduction of index model Y=Ae -BX .More than 52.4%,65.8% and 73.3% of the roots of cotton plants are distributed in the soil layer of 0~20cm,0~30cm and 0~40cm, respectively, and 80.6% of the root is in the range of 0~15cm along both sides of cotton plants .In North Xinjiang the biomass per hectare or per plant is smaller ,but is higher in productivety of root system than those in other cotton planting regions.

关 键 词：新疆北部 棉花 根系构型分布 动态建成 

分 类 号：S562.01[农业科学—作物学]