摘要
本试验于张家口高海拔丘陵山地对不同海拔梯度(海拔1400米、1600米、1800米)夏播小麦的生长发育规律进行了研究。结果表明:植株生育期间的温度决定着生育斯的长短。各海拔梯度的干物质积累均呈慢——快——慢的规律,积累强度以海拔1600米最大。随海拔升高叶片出生所需天数增加,所需积温量相近。不同海拔幼穗分化起止期差异很大,但经历时间基本相同,幼穗分化与植株外部形态均具有稳定的对应关系。籽粒体积的动态变化呈抛物线型,体积大小与粒重呈高度正相关。轩粒灌浆过程用 S 曲线拟合良好,粒重以海拔1600米最高,1400米最低。分析结果表明:不同海拔梯度温、光和土壤含水量等生态因子的不同是造成不同海拔植株生长发育差异较大的主要原因。
A field study was conducted at Yu county,Zhangjiakou,Heibei provi- nce.The experiment was arranged at three elevations(1400M,1600M,1800 M).The results indicated that the temperature is the main factor to determine the growth and development period.The dry matter accumulati- on showed a law of slow-fast-slow at each elevation.the accumulation rate was the highest in 1600M and the lowe st in 1400M.The leaf differ- entiation duration is longer with the elevation incraasing,the accumulated temperature during this process is equal at different elevation.The date of beginning ant terminating for spike differentiaton had a great different ce at various elevation,but the time that spike differentiation underwen- Was basically same.Meanwhile,the spike differentiation had a stable corresponding relationship with the plant extcnal pattrn.Kernal volume had a high degree relation with grain weight.The kernal filling process followed closely S curve line.The grain weight was the highest in 1600M and the lowest in 1400M.The analysis showed ecological factors such as temperature,photoperiod,soil moisture content ere were the chief reason to cause the great difference of the growth and development at various elevation in summer-sowing wheat.
出处
《河北农业大学学报》
CAS
CSCD
北大核心
1989年第3期60-67,共8页
Journal of Hebei Agricultural University
关键词
夏播
小麦
生长
发育
Smmer—Sowing wheat
Growth
Develo pment
