期刊论文

Effects of Paddy Rice Cultivation History on Water and Nitrogen Dynamics During Wheat Growth Period and Wheat Yield

中文

水土保持学报

1009-2242

2020

34

6

259-264+274

10.13870/j.cnki.stbcxb.2020.06.036

41601215:国家自然科学基金 41771261:国家自然科学基金 2019CFB766:湖北省自然科学基金 2016CFA027:湖北省自然科学基金 CCNU19TS005:中央高校基本科研业务费专项华中师范大学项目

本校为第一机构

为揭示水耕年限对小麦生产的影响,在江汉平原选取了3种水耕年限(2年、18年、>100年)稻-麦轮作农田,采集了小麦各生育期的土壤样品与成熟期的小麦植株样品,测定了土壤水分、硝态氮含量、铵态氮含量和小麦产量等指标,分析了土壤剖面水-氮动态分布与积累特征,及其对小麦产量的影响程度与机制。结果表明:(1)随水耕年限延长,土壤水分和氮素含量显著增加。水耕2年、18年和100年农田的0-100 cm深度剖面平均体积含水量分别为0.36,0.39,0.42 cm^3/cm^3。硝态氮和铵态氮在0-20 cm土层富集,水耕2年、18年和100年农田0-20 cm土层硝态氮含量分别为12.26,12.74,14.88 mg/kg,铵态氮含量分别为6.01,8.33,11.69 m...

In order to identify the effects of paddy rice cultivation history on wheat production,three rice-wheat rotation fields with different paddy rice cultivation years(2 years,18 years,and>100 years)were selected for study in the Jianghan Plain.Soil samples and wheat plants were collected in different wheat growth periods to measure the moisture,nitrate nitrogen(NO 3^--N)and ammonium nitrogen(NH 4^+-N)contents in soils,and even the wheat yield.The results showed as follow:(1)With the increase of paddy rice cultivation years,soil moisture,NO 3^--N and NH 4^+-N contents increased significantly.The h...