秸秆还田对豆-稻-菜循环耕作模式下作物产量和土壤肥力的影响

豆-稻-菜循环耕作模式是中国南方地区最重要的轮作模式之一,但秸秆还田对该耕作制度下作物产量和土壤肥力的影响尚不明确。通过连续7年的田间定位试验(2009—2015年),研究秸秆还田对豆-稻-菜循环耕作模式下作物产量和土壤养分状况的影响。结果表明:秸秆还田对浙江省豆-稻-菜轮作模式下作物产量的影响显著:与单施化肥相比,秸秆还田有效提高了水稻和小萝卜的产量,且水稻和小萝卜年均增产10%以上;秸秆还田对豆-稻-菜循环种植区域土壤肥力也有较大影响:提高了土壤有机质、全氮、有效磷、速效钾含量和土壤p H值,此外,秸秆还田区域土壤全氮、有效磷和速效钾含量呈逐年增加趋势。由此可见,多熟制耕作制度下秸秆还田仍具有作物增产和土壤培肥作用,可作为耕地质量提升的有效手段长期实施。

永安市豆—稻—菜轮作高效栽培模式探讨

分析了在永安市实行豆—稻—菜轮作栽培模式的效益和高产栽培技术,为永安市全面调整农业种植结构,创新耕作模式提供依据。

春大豆-晚稻-萝卜农作特征及配套技术

针对农田复种指数下降,粮食播种面积逐年下滑,种植效益低,粮食缺口大的现状,我们研究推广农田一年三熟水旱轮作的新模式及配套技术,推广的春大豆-晚稻-萝卜种植模式,提高了农田复种指数,使有限土地资源、温光资源得到充分利用。实行水旱轮作,秸秆还田、用养结合,改善了农田生态环境,使各季作物丰产增收,从而达到农田稳粮增效。

Effect of Soil Amendments on Soil Borne Pathogens of French Bean （Phaseolus vulgaris L,） in Organic Farming System in Manipur

The rationale behind the use of soil amendments by traditional marginal farmers against soil borne pathogen is an area of interest. The present work ascertain the effect of certain soil amendments against pre emergent and post emergent rot of French bean in the agro climatic condition of Manipur, Four soil amendments： cow dung （COD）, sawdust （SD） ＋ paddy husk （PH）, decomposed floating phytomat （DFP） was tried in field conditions in four different combinations. These have been often used by the traditional farmers. A locally available commonly cultivated pole type of French bean has been used for the study. Disease incidences in plots treated with these amendments were then compared with that of control plots where no amendments were made. The plots with a combined treatment of the soil amendments showed maximum seed germination and least post emergent rot against sclerotinia rot. But DFP showed effectiveness against rhizoctonia rot with maximum seed germination while saw dust showed maximum decrease in post emergent rot against rhizoctonia rot. The plots treated with organic soil amendments showed statistically significant positive effect against the pathogens as compared with untreated control plots.