【摘 要】
：
No-till(NT)farming systems have advantages in economic,environmental and soil quality aspects over conventional tillage.However,NT systems contributed to the build-up of herbicideresistant weed popula
【机 构】
：
School of Agriculture and Food Sciences,The University of Queensland,Toowoomba,Qld 4350 Australia
【出 处】
：
第20届国际土壤与耕作研究组织大会
论文部分内容阅读
No-till(NT)farming systems have advantages in economic,environmental and soil quality aspects over conventional tillage.However,NT systems contributed to the build-up of herbicideresistant weed populations,increased incidence of diseases and stratification of nutrients and organic carbon near the soil surface.
其他文献
小麦的穗长、小穗数、穗粒数等穗部性状直接影响其经济产量,这些性状大多为多基因控制的数量性状,研究这些数量性状的遗传对进一步通过遗传改良或分子育种的手段提高产量非常重要.
小麦品种川麦42 是人工合成小麦与普通小麦杂交育成的高产、抗条锈、广适小麦新品种,且用该品种做亲本已培育出一系列新品种,已成为我国小麦育种的重要骨干亲本.
小麦籽粒产量形成碳水化合物供应主要来自开花后叶片的光合产物生产,了解小麦叶片衰老过程的特征,对通过遗传手段控制小麦叶片的衰老过程进而提高小麦产量有重要意义.
在QTL 水平上研究实心度与茎秆强度的遗传关系及实心度对茎秆强度的影响,为小麦抗倒伏育种的选择提供参考依据.利用普通小麦宁麦18 与实心小麦品种"武云实秆"的F2 和F2∶3 群体,对小麦茎秆强度与实心度、壁厚、茎粗和髓腔直径进行了相关分析,并对其茎秆强度相关性状QTL 进行分子标记定位及遗传效应分析.
倒伏是制约现代小麦生产的重要限制因素之一.半矮秆品种的育成大幅度地提高了小麦的抗倒伏能力,但当株高降低到一定程度时,由于生物产量减少,必将造成产量降低.因此,明确除株高以外的其它与抗倒伏性有关的性状,对于进一步提高小麦的抗倒伏性至关重要.
建国以来,我国小麦育种工作者选育了众多优良新品种,在全国范围内实现了9 次大的品种更换,从外引品种为主到实现自主创新、小麦遗传改良发展取得了突破性进展.然而,每一次大面积推广品种的形成都与一个或数个育种骨干亲本的出现密不可分,突破性育种材料的出现是推动品种更新换代的内在动力.
Improvement of flour quality is one of the main objectives in the process of wheat breeding.It is supposed that wild emmer wheat can provide a lot of genetic variants of the endosperm storage proteins
The small farmers of the Andes of Peru has developed traditional agricultural practices,as soil tillage with animal traction or hand power,earthing crops up and stubble burning,leading soil depletion
It is well acknowledged that nitrous oxide(N2O)is a major greenhouse gas(GHG),which is mostly derived from agriculture.About 58%of GHG emissions from agriculture are N2O,and two‐third of those N2O emi
To solve stand establishment issues in high residue situations,the utility of an application of liquid nitrogen(N)fertilizer to stimulate microbial activity and subsequent decomposition of crop residu