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为了阐明免耕和常规翻耕20 cm下花生不同器官铁累积利用差异,在鲁东花生主产区3个典型棕壤试验点(望城、夏甸和齐山)系统研究了免耕和常规翻耕下花生铁营养特性变化。结果表明,相比免耕处理,常规翻耕20 cm增加了花生籽仁铁的累积,在望城点、夏甸点和齐山点分别增加了38.4%、20.2%和51.2%,且籽仁铁的累积与籽仁氮的累积及花生产量呈极显著正相关(P<0.01)。免耕处理促进了花生茎、叶、果针和果壳等器官中铁的奢侈累积,在望城点、夏甸点和齐山点,这4个器官铁的累积量比常规翻耕处理分别提高了6.0%、32.1%和14.7%,同时花生累积带走的总铁量高于常规翻耕处理,从而造成土壤有效铁含量及土壤铁活化系数均比常规翻耕处理下降了15.1%~32.9%。综上,土壤翻耕措施能够有效增加花生籽仁铁的累积分配,降低茎、叶、果针和果壳等器官中铁的无效累积,从而提高花生铁的利用效率,该研究结果为花生田铁营养合理管理提供了理论依据。
In order to elucidate the difference of iron accumulation and utilization of different organs in 20 cm cm under zero tillage and conventional tillage, three typical brown soil test sites (Wangcheng, Xiadian and Qishan) Changes of Nutritional Characteristics of Plowed Peanut. The results showed that the conventional tillage 20 cm increased the iron accumulation in peanut kernels and increased 38.4%, 20.2% and 51.2% in Wangcheng, Xiantian and Qishan respectively compared with no-tillage treatment, and the seed iron There was a significant positive correlation between the accumulation of nitrogen and the accumulation of nitrogen and the yield of peanut (P <0.01). No-till treatment promoted the extravagant accumulation of iron in organs such as stem, leaf, fruit needle and shell of peanut. The accumulations of iron in these four organs were increased respectively in Wangcheng, Xiadian and Qishan spots 6.0%, 32.1% and 14.7%, respectively. Meanwhile, the total amount of iron taken away by peanut was higher than that of conventional tillage, resulting in a decrease of 15.1% -32.9% in soil available iron and soil iron activation compared with conventional tillage. In conclusion, soil tillage measures can effectively increase the cumulative distribution of iron in peanut seeds, and reduce the inefficient accumulation of iron in stems, leaves, fruit needles and fruit husks, thus improving the utilization efficiency of peanut. The results of this study are as follows: Nutrition reasonable management provides a theoretical basis.