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ID:33483934
大小:2.11 MB
页数:52页
时间:2019-02-26
《小麦-玉米种植体系中养分资源利用规律及平衡的研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、而土壤碱解氮含量则是中产>高产>低产。5.胶东低山丘陵pH平均为5.64,多数土壤呈酸性或微酸性;有机质含量平均为18.29·k哲1,是五个生态类型区中最高;微量元素硼缺乏。鲁西北平原区pH平均为8.19,多数土壤呈碱性反应;中量元素丰富,微量元素铁、锰缺乏;有机质含量为14.89·k91,是五个生态类型区中有机质含量最低。鲁中山地丘陵区pH为6.92,多数土壤呈中性反应。鲁南山地丘陵区pH平均为5.31,多数土壤呈酸性或微酸性,缺乏微量元素硼。鲁西南平原区pH平均为8.0,多数土壤呈碱性反应。6.山东省小麦.玉米一个轮作周期氮磷钾的平均投入分别为475.0kgN·11In。2
2、、200.4kgP205-hm之、130.9kgK20·hm-2,平均产出为341.5kgN·hm五、118.0kgP205·hma、238.0kgK20·hm-2。氮盈余量为133.5kgS·hm-2,磷盈余量为82.4kgP205-hm"2,钾亏缺量为107.2kgK20·hrn-2。关键词:山东省,小麦玉米,施肥,土壤养分,吸收利用,平衡小麦一玉米种植体系中养分资源利用规律及平衡研究StudyonSoilNutrientResourceandNutrientBalanceofWheat..maizeRotationAbstractWheatandmaizearethema
3、infoodcropsinShandongprovince.Wheat—maizeRotationisthemainplantingsysteminShandongprovince.Accordingtothefarmerinvestigation,soiltestinganalyzingandstatisticdata,weanalyzethefertilizerconsumptionofwheat-maizerotation,thenutrientresourceusing,thesoilnutrientvarietyandthebalanceofnutrientresou
4、rceinShandong.Findouttheproblemsandputsforwardcountermeasures.Themainresultsareasfollows:.1.Thebasefertilizerofwheatmainiscompound(mixed)fertilizer.Seedmanureisdiammoniumphosphate.Thenitrogen,phosphorusandpotassiumfertilizerinputsofWheatseaso玛higherthanthecornseason.Overall,nitrogenandphosph
5、orusfertilizerinputexcessive,kdeficiency.2.ThesoilpHrangeofwheat-maizerotationis3.74---,9.27.Averageis7.06,greatdifferencebetweeneacharea.Thewholefromeasttowestisincreasinggradually.TherangeofOrganicmattercontentis6.99·kg"1to36.89·kg’1;averageis15.99·k91,andtheregionalgapisnotobvious.,3.Thes
6、oilnutrientstatusofShandongprovincewheat-maizerotationsystemisinthemoderatepartiallevel.Above80%ofthetotalnitrogen,alkelinenitrogen,availablephosphorusandavailableKcontentinWheat-maizerotationisthehighlevel.Availablephosphoruswereaverageof38.259。k91,belongtoarichlevel.Butthecoefficientofvari
7、ationWas60.40%.ThecontentofN、P、Kinahi曲level.Fe、Mn、Cu、Znarerich.Boronismedium.4.Soilorganicmatter,availableP,rapidly-availablepotassiuminthedifferentlevelofoutputdistributionisconsistent,highyield>middleyield>lowyield;Soilalkelinenitrogencontent:mid
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