通过连续6a的田间试验,分析比较了茶陵县杂交中稻的相对产量、相对吸收量与土壤肥力的关系,根据杂交中稻的N、P、K养分相对吸收量划分土壤N、P、K丰缺指标。采用三元二次回归,建立了不同肥力条件下杂交中稻的N、P、K肥料效应模型,依据模型提出了不同肥力水平(目标产量)下杂交中稻的测土配方最佳施肥用量及施肥技术。

C orrelations of relative yield, relative nutrient absorption w ith soil fertility w ere analyzed by 6 years field experim ents. T he plentiful-lack index of N , P and K for the soil w as divided by the relative absorption of N , P and K by hybrid m iddle-rice. T he three-factor orthogonal quadratic regression w as used to build fertilizer effect m odel of hybrid m iddle-rice in different soil fertility. B ased on the m odel, the optim alfertilizing am ountand technology ofhybrid m iddle-rice in C haling county underdifferentsoilfertility ortargetyield.

以三系杂交水稻德香4103和川作6优177为材料,在盆栽条件下,研究不同播种期对成都平原杂交中稻直播生长发育和产量的影响。结果表明,随着播种期的推迟,杂交中稻生育期缩短,主茎叶片数减少,出叶速度加快;在基本苗数相同的情况下,随着播种期的推迟,单株最高分蘖数和成穗率均降低,直播稻产量呈下降趋势。

The effects of sowing date on growth and yield of direct-seeding rice was researched through pot experiment by using three-line hybrid rice Dexiang 4013 and Chuanzuo 6 you 177 in Chengdu plain. The results indicated that along with the delayed sowing date, the whole growth period was shortened, the number of leaves on main stem reduced, leaf emergence speed was accelerated. Under the condition of the same basic seedling number, along with the delayed sowing date, the maximum tiller number per plant, the earbering tiller percentage and the yield were decreased.

甬优9号系浙江省宁波市农业科学院作物所与宁波市种子公司联合育成的籼粳杂交稻新品种,其丰产性好,米质优,适宜在福建省作中稻种植.介绍了该品种在尤溪作中稻及一季晚稻示范种植产量表现及高产栽培技术要点.

Yongyou 9 was developed by Crop Research Institute, Ningbo Academy of Agricultural Sciences and Ningbo Seed Co., Ltd. In 2010, Yongyou 9 was introduced and planted in Youxi County of Fujian province for high yield and rice quality. In this paper, we introduced planting performance and high-yielding cultivation techniques of Yongyou 9.

闽丰优3301系福建省农科院生物技术研究所育成的籼型三系杂交水稻,2010年通过福建省农作物品种审定,2011年通过国家品种审定.闽丰优3301在长汀作中稻—再生稻栽培,表现为抽穗整齐、高产、抗病、再生力强等特点.介绍了其在长汀县作中稻—再生稻种植表现及高产栽培技术.

A three-line indica hybrid rice combination Minfengyou 3301 was developed by Bio-technology Research Institute of Fujian Academy of Agricultural Sciences, and was released by Fujian province in 2011 and nation in 2012, respectively. It was grown as mid-season ratoon rice at Changting county, showing heading uniformity, high yield, resistant blast and strong rationing ability. Its planting performance and high-yielding cultivation techniques as mid-season ratoon rice at Changting county were introduced.

以近年审定的20个杂交中稻品种为材料,研究了分蘖期和抽穗期淹涝胁迫对杂交中稻的某些生理指标、生长发育、产量及干物质生产的影响。结果表明:(1)淹没胁迫对杂交中稻的生育期有显著影响。分蘖期受淹没胁迫,头季稻和再生稻的抽穗期分别平均延长了3.25 d和3.95 d,成熟期分别平均延长了1.85 d和2.75 d;而抽穗期受淹没胁迫,成熟期会提前,平均提前1.60 d,且品种间差异较大。(2)淹没胁迫对杂交中稻的产量有显著影响。与对照相比,分蘖期受淹没胁迫,分蘖期叶干重、有效穗数、每穗粒数降低,使其平均减产59.0%;齐穗期受淹没胁迫,每穗粒数和结实率显著降低,使其平均减产57.6%。(3)分蘖期受淹没48 h后,不宜割苗蓄留再生稻,应以加强田间管理保留头季稻为主,耐淹性较强的品种有川谷优6684、冈优169和乐优198;抽穗期受淹没48 h后,则以割苗蓄留再生稻较佳,其中冈优169、内5优317、蓉优22和川谷优6684的产量较高。(4)分蘖期和抽穗期耐淹组合间没有相关性,生产上应分别在各时期筛选相应耐淹能力较强的品种。

The physiological and growth characteristics, yield formation and dry matter production of 20 mid-season hybrid rice com-binations administrated recently were investigated under submergence stress at tillering stage and heading stage. The results showed that: (1)The growth period of mid-season hybrid rice combinations were significantly affected by submergence stress. Under submer-gence stress at tillering stage, the heading stage of main crop rice and ratoon rice were delayed by 3.25 d and 3.95 d, the maturity stage were delayed by 1.85 d and 2.75 d respectively;however, the maturity stage were decreased by 1.60 d under submergence stress at heading stage. (2)The yields were significantly affected by submergence stress. Compared to the contrast, the yields of hybrid rice combinations with submergence stress at tillering stage decreased by 59.0%, because of the decrease of leaf dry matter, effective pani-cles and grain number per panicle; the yields of hybrid rice combinations with sub