摘要
以冬闲-双季稻为对照,通过对黑麦草-双季稻、紫云英-双季稻、油菜-双季稻和马铃薯-双季稻等5种不同冬季覆盖植物稻田土壤养分变化及晚稻生长进行为期4年的定位研究。结果表明:不同冬季覆盖植物均能改善稻田土壤肥力状况,提高稻田土壤有机碳和全氮的含量,促进晚稻对养分的吸收和植株生长发育。晚稻植株的根系和地上部分干物质积累量均明显高于对照;上述4种冬季覆盖植物晚稻的有效穗数分别比对照增加23.36,21.24,11.19,31.86万/hm2,其穗长、穗重和结实率与对照均无明显差异,千粒重分别比对照增加0.11,0.95,0.13,0.51g;油菜-双季稻晚稻的穗干重明显高于对照及其它处理。稻田冬季覆盖植物有利于改善晚稻产量构成因素,不同程度地提高水稻产量,分别比对照增加649.67,558.64,437.26,783.82kg/hm2。
The effects of different winter cover crops on paddy soil nutrients and growth of late rice in southern China were studied.Compared with fallow-double cropping rice（CK）,the soil fertility,paddy soil organic carbon content and total nitrogen content of the soil under ryegrass-double cropping rice（T1）,Chinese milk vetch-double cropping rice（T2）,rape-double cropping rice（T3） and potato-double cropping rice（T4） were improved during four-year positioned investigations.Under different winter cover crop conditions,the ability of absorption of nutrients and growth of late rice were improved,so that the biomass accumu-lation of late rice of T1,T2,T3,T4 were higher than that of CK.Compared with the control,the number of effective tillers of late rice was increased by 23.36,21.24,11.19 and 31.86 ten thousand per hm^2.There was no obvious different in panicle length,fresh weight of panicle and seed setting rate of late rice under different winter cover crop conditions.Compared with the CK,1 000-grain weight of late rice under four different winter cover crop conditions increased by 0.11,0.95,0.13 and 0.51 gram,respectively.And the dry weight ofpanicle in T3 was higher than that of the other treatments and CK.Meanwhile,the results indicated that yield components of late rice were improved and grain yields increased by 649.67,558.64,437.26 and 783.82 kg/hm^2 under four different winter cover crop conditions.
出处
《江西农业大学学报》
CAS
CSCD
北大核心
2010年第1期9-14,19,共7页
Acta Agriculturae Universitatis Jiangxiensis
基金
国家"十一五"农业公益性行业科研专项经费项目(20083028)
"十一五"国家科技支撑计划资助项目(2006BAD15B08)
湖南省科技厅项目资助(2009NK3158)
关键词
冬季覆盖植物
土壤养分
晚稻
产量
winter cover crop
soil nutrient
late rice
grain yield
