CAJ | 학술논문

选取当前生产上较有代表性的高粱杂交种辽杂10号、辽杂19号和辽杂35号为试材，采用盆栽控水试验，调查和测定了不同水分处理对高粱幼苗物质积累、根部性状和光合参数的影响。结果表明：水分胁迫达到重度时，高粱幼苗次生根产生数量较少且死亡根数大量增加，幼苗对养分的吸收和与外界的气体交换都会严重受阻，影响生长；在水分胁迫时，高粱幼苗的根系变化活跃，中度胁迫12 d以内仍可通过自身调节保证相对稳定的总根数。随着水分胁迫的加重，高粱幼苗株高呈下降趋势，随着胁迫时间的增加新生次生根数呈抛物线状变化，死亡根数随着胁迫时间的增加呈直线增加，根冠比表现为轻度胁迫＞中度胁迫＞对照（ck）＞重度胁迫。随着水分胁迫的加重，光合速率呈下降趋势，在轻度至中度胁迫间差异相对较小；高粱幼苗对水分的利用效率和蒸腾速率均随着胁迫的加重有所下降，水分循环速度减慢，与根系数量减少有关。
선취당전생산상교유대표성적고량잡교충료잡10호、료잡19호화료잡35호위시재，채용분재공수시험，조사화측정료불동수분처리대고량유묘물질적루、근부성상화광합삼수적영향。결과표명：수분협박체도중도시，고량유묘차생근산생수량교소차사망근수대량증가，유묘대양분적흡수화여외계적기체교환도회엄중수조，영향생장；재수분협박시，고량유묘적근계변화활약，중도협박12 d이내잉가통과자신조절보증상대은정적총근수。수착수분협박적가중，고량유묘주고정하강추세，수착협박시간적증가신생차생근수정포물선상변화，사망근수수착협박시간적증가정직선증가，근관비표현위경도협박＞중도협박＞대조（ck）＞중도협박。수착수분협박적가중，광합속솔정하강추세，재경도지중도협박간차이상대교소；고량유묘대수분적이용효솔화증등속솔균수착협박적가중유소하강，수분순배속도감만，여근계수량감소유관。
Using more representative sorghum hybrids Liaoza No .1 0,Liaoza No .1 9 and Liaoza No .35 in current production as test materials,through pot water control test,matter accumulation,root traits and photosynthetic parameters under different water treatments were investigated and determined .The results show that:When reaching severe water stress,secondary roots produce a smaller number while death root number increases substantially,and seedling nutrient uptake and gas exchange with the outside world are severely hampered,which affect seedlings′growth;during water stress,sorghum seedlings root system changes actively,and moderate stress within 1 2 days can ensure a relatively stable total root number . With the water stress exacerbation,sorghum plant height displays a downward trend,and secondary root number displays parabolic change,while the number of death root number displays increasing linear change .With the increase of stress days,shoot ratio displays moderate stress>control (ck)>severe stress .With the aggravation of stress,photosynthetic rate showed a downward trend,and there is a small difference between mild to moderate stress;water use efficiency and transpiration rate of sorghum seedlings display a declining trend with the aggravation of stress,related to the decrease of root number .