摘要
以地下水动态指标SEW3 0 反映作物的受渍程度 ,利用田间小区试验和测坑试验研究了夏大豆结荚期持续受渍对产量与品质的影响。结果表明 ,随着受渍程度加重 ,大豆减产幅度增大 ,籽粒粗脂肪含量呈上升趋势 ,粗蛋白含量呈下降趋势 ;各处理之间的产量差异显著 ,而粗脂肪含量和粗蛋白含量的差异不大 ;外在品质指标秕荚率与受渍程度关系密切 ,各处理之间差异显著。由于作物相对产量和秕荚率均与SEW3 0 密切相关 ,在选择夏大豆结荚期排水控制指标时 ,应以受渍对作物产量的影响为主 ,同时参考对秕荚率的影响。如果以减产 10 %～ 15 %作为大豆排水控制指标选择的标准 ,则相应的大豆结荚期排渍控制指标以 15 0～ 2 0 0cm·d为宜。
SEW 30 is an index expressing dynamic state of groundwater. Taking SEW 30 as a degree of crop to suffer subsurface waterlogging, influence upon yield and quality of soybean to be in continuous subsurface waterlogging was studied in pod bearing period (key growth duration) of summer soybean by small field districts and test pits. Results show that reduction degree of soybean yield increases, coarse fat content in soybean seeds raises, and coarse protein content in soybean seeds reduces along with the time extension of the subsurface waterlogging stress; The difference among different trial treatments is significant in yield, not significant in content of coarse fat and coarse protein; The rate of blighted pod which is regarded as an external quantity index of soybean is a close interrelationship with a degree of soybean to suffer subsurface waterlogging, and there is a significant difference among different treatments. Because crop relative yield and blighted pod rate are all close relative to SEW 30 , when dominated index for drainage is selected in pod bearing period of soybean , the yield of soybean to be in continuous waterlogging should be regarded as a major factor, while blighted pod rate as a conference. If 10%～15% of yield reduction is taken as a standard for selection of soybean drainage index, correspondingly, the dominated index SEW 30 for drainage should be 150～200 cm·d in pod bearing period of soybean.
出处
《中国农业科学》
CAS
CSCD
北大核心
2003年第4期420-425,共6页
Scientia Agricultura Sinica
基金
湖北省教育厅国际合作资助项目 (98G0 0 5 )
重大资助项目 (2 0 0 2Z0 0 0 0 8)
湖北省科技厅"九五"重大科技攻关资助项目 (962P0 5 0 3 5 )
关键词
大豆
结荚期
地下水连续动态
排水控制指标
产量
Drainage index
Summer soybean
Pod bearing period of soybean
Stress of subsurface waterlogging
