摘要： 通过比较试验,对目前华北平原小麦-玉米一年两熟农作制度下麦秸还田与否对土壤养分含量的影响及其动态性变化规律进行了探索,以寻求最佳耕作措施。结果表明,不同耕作措施各处理麦收后的肥力基础一致。苗期、拔节期、大喇叭口期、抽雄吐丝期、灌浆期、成熟期的土壤养分测定结果显示出差异,且随时间推移差异表现越明显。各期各处理平均值比较表明:麦秸不还田+免耕处理的土壤有机质含量最低,绝对值降低了1.24～2.11 g/kg,相对值降低了9.01%～15.31%,麦秸还田处理比麦秸不还田处理平均增产10.54%,单位面积产量以处理③最高,其次为处理①。
关键词:
玉米,
麦秸还田,
土壤养分含量,
影响
Abstract: With the comparative experiment,we have analysed whether the straw of wheat return in farmland to soil nourishing ingredient of content with influence and diversificational rule in wheat-corn crops planting annually, then in order to seek the primary and best ploughing method.There are four disposals in this experiment.This experiment was adopted randomicity array, for 3 times repetition.From result of the experiment, it has indicated that under dissimilarity measures of farming disposal, the fertility which is based on apiece disposal of small sections after harvest of wheat will have the very similar essence in all.During the seed-growing and young planting period, the period of jointing, big-trumpet-jaws period, the male-ear-head period, grouting period, the ripeness period, testing aftermath of soil nourishing content which reveals diversity, and then the delay of time has much more in differences.Each period apiece disposal average values in comparative has indicates that organic soil substance content has the lowest in straw of wheat non-return to farmland and no ploughing up to soil.The absolute value-reducing-extent 1.24-2.11 g/kg, opposite value-reducing-extent 9.01%-15.31%.The treatment of wheat straw back to field than the wheat straw not to return field, the average increase yield 940.60 kg/ha.Increase yield rate was 10.54%.The unit area yield of treatment ③ was highest, followed by treatmenT1.In order to attain the high-yield in corn,uninterrupted cultivate soil for fertility, enhance farming stratum soil organic substance content, it should be the practical and popularized method of farming by straw of wheat return to farmland
Key words:
Corn,
Straw of wheat return to farmland,
Soil nourishing ingredient content,
Effect
中图分类号:
王春虎, 陈士林, 冯荣成. 麦秸还田对夏玉米田养分含量的影响[J]. 华北农学报, 2010, 25(3): 170-174. doi: 10.7668/hbnxb.2010.03.036.
WANG Chun-hu, CHEN Shi-lin, FENG Rong-cheng. Research in the Effect of Nourishing Ingredient Dynamic Transformation of Straw for Wheat Return to Corn Field[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2010, 25(3): 170-174. doi: 10.7668/hbnxb.2010.03.036.