干旱气象
榦旱氣象
간한기상
GANSU METEOROLOGY
2014年
5期
760-764,772
,共6页
玉米%干旱区%水分胁迫%生长发育指标
玉米%榦旱區%水分脅迫%生長髮育指標
옥미%간한구%수분협박%생장발육지표
maize%arid region%water stress%growth index
本实验设计正常灌水处理（CK）和水分胁迫处理（DT）2种模式，通过比较2种水分处理下不同发育期玉米各生育指标的变化，研究干旱地区水分胁迫对玉米不同生育时期生长的影响。结果表明：拔节期后，植株对水分需求迫切，干旱易造成营养器官发育不良、植株矮小、叶片早衰，植株的各项生育期相关指标均显著低于正常灌水处理；抽雄-乳熟期，干旱导致果穗发育不良、籽粒不饱满、穗小粒少，并影响植株内部的干物质分配，穗重所占比例明显低于正常灌水处理，最终导致成熟期产量大幅度下降，部分植株出现空杆。
本實驗設計正常灌水處理（CK）和水分脅迫處理（DT）2種模式，通過比較2種水分處理下不同髮育期玉米各生育指標的變化，研究榦旱地區水分脅迫對玉米不同生育時期生長的影響。結果錶明：拔節期後，植株對水分需求迫切，榦旱易造成營養器官髮育不良、植株矮小、葉片早衰，植株的各項生育期相關指標均顯著低于正常灌水處理；抽雄-乳熟期，榦旱導緻果穗髮育不良、籽粒不飽滿、穗小粒少，併影響植株內部的榦物質分配，穗重所佔比例明顯低于正常灌水處理，最終導緻成熟期產量大幅度下降，部分植株齣現空桿。
본실험설계정상관수처리（CK）화수분협박처리（DT）2충모식，통과비교2충수분처리하불동발육기옥미각생육지표적변화，연구간한지구수분협박대옥미불동생육시기생장적영향。결과표명：발절기후，식주대수분수구박절，간한역조성영양기관발육불량、식주왜소、협편조쇠，식주적각항생육기상관지표균현저저우정상관수처리；추웅-유숙기，간한도치과수발육불량、자립불포만、수소립소，병영향식주내부적간물질분배，수중소점비례명현저우정상관수처리，최종도치성숙기산량대폭도하강，부분식주출현공간。
This experiment has been designed two modes including normal irrigation treatment (CK)and water stress (DT).By com-paring the changes of maize growth index in different growing stages under two kinds of treatments,the effects of water stress on growth index of maize in arid region were discussed.The results showed that after the jointing stage,water demand for maize plants was ur-gently.Drought could cause the dysplasia of plant organs,plant short and leaf premature senility.The maize’s growth indexes under water stress mode were obviously lower than those under the normal water irrigation treatment mode.During the tasseling-milk ripe stage,drought could cause the grain dysplasia and hollow kernels,small grains and little seeds,while it had an effect on the dry matter distribution.The proportion of grain weight under drought stress mode was obviously lower than that under normal water supply mode. Finally during the mature period,the maize output declined dramatically and even had the empty corn bars.
