国家“十二五”科技支撑计划项目(2011BAD16B06-3, 2012BAD04B09, 2012BAD14B13)资助。
以扬麦12为材料，在大田稻茬栽培条件下研究不同播量、行距及氮素运筹栽培措施对小麦叶绿素含 量、光合速率及产量构成因素的影响。结果表明，在施氮总量为150~300 kg·hm-2下，基氮比例60%、叶龄余数为1时追施40%氮肥处理时，后期叶绿素含量明显高于全部基施氮肥；基本苗225万·hm-2时小麦产量极显著高于基本苗300万·hm-2和 375万·hm-2。
The effects of chlorophyll content, photosynthetic rate and constitution factor of yangmai 12 under different seedling rates, row spacing and nitrogen strategies were studied in rice cultivation condition. The results showed that the chlorophyll content of wheat at later stage with basal application of all nitrogen fertilizer was obviously lower than that under the total amount of nitrogen application of 150-300 kg·hm-2with base nitrogen proportion of 60%, and topdressing of 40% at the stage of foliar age remainder 1. The output of wheat grown under basic seedling of 2 250 000 per hm2 was significant higher than that grown under basic seedling of 3 000 000 per hm2 and 3 750 000 per hm2.