| Research on best factor combination for wheat yield on dry-land of Weibei |
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| DOI：10.7606/j.issn.1000-7601.2007.01.40 |
| Key Words: plastic film mulch furrow planting straw mulch N fertilizer rate grain yield biological output |
| Author Name | Affiliation | | LIU Wen-guo | Yangling Vocational and Technical College,Yangling,Shaanxi 712100,China | | ZHANG Jian-chang | Yangling Vocational and Technical College,Yangling,Shaanxi 712100,China | | CAO Wei-xian | Yangling Vocational and Technical College,Yangling,Shaanxi 712100,China | | DANG Zhan-ping | Yangling Vocational and Technical College,Yangling,Shaanxi 712100,China | | QIANG Qin | Yangling Vocational and Technical College,Yangling,Shaanxi 712100,China | | GAO Ya-jun | College of Resource and Environment Northwest A＆F University,Yangling,Shaanxi 712100,China | | LI Sheng-xiu | College of Resource and Environment Northwest A＆F University,Yangling,Shaanxi 712100,China |
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| Abstract: |
| Field experiments of wheat on Weibei Highland of Shaanxi Province were carried continuously for three years.The treatment factors included cultivation pattern,nitrogenous fertilizer level,and plant density.The results indicated as follows: the application of ditch,plastic film covers,and straw mulch cultivation did not influence the wheat ear number,whereas nitrogenous fertilizer remarkably affected the wheat ear number;within N application rate 0～240 kg/hm2,every N increased 4 288 wheat ear number;increasing broadcasts extremely obviously enhanced the wheat ear number;nitrogenous fertilizer amount used and plant density did not influence grain number per ear;weight of a thousand grains was remarkable different between film covering and ditch cultivation,plant density obviously affected the weight of a thousand grains under the different condition;under the plastic film cover cultivation with high nitrogenous fertilizer level,the low density had larger weight of a thousand grains than that under the high density;under the ditch pattern,the weight of a thousand grains between the high nitrogen level(N 240 kg/hm2) and middle nitrogen level(N 120 kg/hm2) had no remarkable difference,but was increased compared with that without nitrogenous fertilizer;under straw mulch pattern,the weight of a thousand grains by the high-density(seeds 225 kg/hm2) without nitrogen and with high nitrogen (N 240 kg/hm2) was the lowest,and had no remarkable differences between them, but had remarkable difference to other combinations;in the normal precipitation years,cultivation patterns could remarkably affect wheat yield on arid land,the wheat yield under plastic film cover is remarkably higher than that of ck;in the precipitation rich years,the ditch pattern and the straw stalk cover pattern even had negative effect on wheat yield;the nitrogenous fertilizer had extremely influence on wheat yield,within 0～240 kg N/hm2,every kg pure nitrogen could increase 5.7 kg grain yield;the influence of plant density on wheat grain and biological yield was significant,the yield difference between the grass cover cultivation and the conventional cultivation(ck) also was significant;generally the yield under high density(seeds 225 kg/hm2) was bigger than under low density(seeds 180 kg/hm2);under low and no nitrogen application,the wheat yield could be enhanced through increasing plant density. |
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