摘要
在大田条件下研究了不同水分处理对烟农0428产量、产量构成因素以及水分利用效率的影响。结果表明:随着干旱程度的加剧,小麦生物产量、经济产量和经济系数降低;当土壤相对含水量低于60%时,烟农0428的生物产量、经济产量大幅度降低,说明土壤相对含水量60%是其获得较高籽粒产量的水分临界点;播种至拔节期,60%的土壤相对含水量是保证公顷穗数在600万以上的水分临界值,拔节至灌浆期它又是保证千粒重在40 g以上的水分临界值;处理6(非需水关键期和需水关键期的土壤相对水分含量下限是60%)经济产量为9 200.4 kg/hm2,水分利用效率高达24.81 kg/(hm2·mm),说明一定范围内,水分利用效率随土壤水分含量的增加而增加,超过一定范围后,水分利用效率呈明显的下降趋势。
The effects of different water treatments on the yield, yield components and water use efficien- cy of Yannong 0428 were studied in field. The results showed that the biological yield, economic yield and e- conomic coefficient of wheat decreased with the drought degree increasing. The biological yield and economic yield of Yannong 0428 decreased markedly when the soil water content below 60% , which showed 60% was the critical water content point. The relative soil water content of 60% was the critical value fitted to keep more than 6 million spikes per hectare from sowing to jointing and kept 1 000 - grain weight over 40 g from jointing to grain filling. The economic yield and water use efficiency of treatment 6 were 9 200.4 kg/hm2 and 24.81 kg/（hm2·mm） respectively, which indicated that the water use efficiency （WUE）increased with the soil water content increasing in a certain range, and the WUE declined when the relative soil water content was out of the range.
出处
《山东农业科学》
2015年第6期22-25,共4页
Shandong Agricultural Sciences
基金
国家现代农业产业技术体系建设项目:烟台综合试验站(CARS-3-2-23)
山东省农业良种工程项目:高产
优质强筋
抗逆
节水型小麦新品种选育
利用分子育种技术加速抗旱优质小麦种质创新与应用(2013NC056)
