摘要
试验设置养蟹田单穴单株、单穴双株、单穴四株和不养蟹田单穴双株4个处理,研究了不同水稻栽培模式下稻田土壤容重、团聚体含量、pH、有机质、土壤总氮、碱解氮、速效磷、有效钾和水稻产量的变化规律。结果表明:与不养蟹稻田相比,养蟹稻田可以显著降低土壤容重,增加粒径>0.2 mm团聚体的含量,降低粒径<0.002 mm微团聚体的含量,土壤团聚化程度加强,同时可以调节土壤pH,显著提高土壤中有机质的含量,但对土壤总氮含量影响不显著,在水稻生长后期会显著提高土壤中碱解氮、速效磷、有效钾含量,养蟹稻田内理化性状和土壤养分含量受栽培模式的影响均不显著。养蟹稻田水稻产量高于常规稻田,养蟹稻田内各处理间差异不显著,以单穴四株水稻产量最高。
The experiments were carried out to study effects of different cultivation patterns on the soil unit weight, soil aggregate, pH, soil organic, total N, alkali-hydrolysis N, available P, available K and rice yield in rice-carb culture system. Four treatments were designed, including, one seeding per hill in rice-carb, two seeding per hiU in rice-carb, four seeding per hill in rice-carb, and two seeding per hill in rice. Compared with conventional paddy fields, rice-carb paddy fields could reduce soil aggregate, increase the number of larger aggregates（〉0.2 mm）, reduce the content of smaller aggregates（〈0.002 mm）significantly, improve soil aggregates level, and adjust the soil pH value to 7, increase soil organic significantly, the soil total N content were not significantly affected, while soil alkali- hydrolysis N, available P, available K were improved at mature stage. Different cultivation patterns had not significantly affect on the soil physical and chemical properties and nutrition. Rice-carb paddy fields yield was higher than conventional rice, whereas, there were not significantl affect in different treatments rice yield in rice-carb paddy fields, but four seedings per hill for the rice yield was highest.
出处
《广东农业科学》
CAS
CSCD
北大核心
2013年第9期53-57,共5页
Guangdong Agricultural Sciences
基金
上海市中华绒螯蟹产业技术体系
上海市重点学科建设项目(Y1101)
国家星火计划项目(2011GA680001)
欧盟FP7亚欧水产平台(245020)
上海海洋大学水产动物遗传育种中心(ZF1206)
关键词
稻蟹共生
栽培模式
土壤理化性状
土壤养分
rice-carb culture
cultivation patterns
soil physical and chemical properties
soil nutrition
