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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。
Yangmai 12 was used to study the effects of different seeding rates, row spacing and nitrogenous cultivation methods on the chlorophyll content, photosynthetic rate and yield components of wheat under field cultivation of rice stubble. The results showed that the chlorophyll content of the late stage was significantly higher than that of the total base nitrogen application when the N application rate was 150 ~ 300 kg · hm-2, the ratio of base nitrogen was 60% and the leaf age was 1. The output of wheat at the basic seedling of 2.25 million hm-2 was significantly higher than that of the basic seedlings at 3 million h-2 and 3.75 million h-2.