有机无土栽培彩色甜椒的生长发育特点与动态

本试验对有机无土栽培彩色甜椒的生长发育特点、动态和坐果水平进行了调查和研究。结果表明：低温是造成结果初期畸形果多的主要原因；株高、株幅、分枝级数、茎粗、果长和果肩宽度在不同生育期增长速度不同，但总体上符合“慢-快-慢”的增长曲线，但如果管理不当，株高在结果末期会出现“负增长”的现象，并就不同的增长速度做了研究：对在开花坐果期植株进行的3种不同处理表明：有机无土栽培不蹲苗或轻蹲苗，能增加单株坐果数。     

温度对Olsen法测定潮土速效磷的影响和校正方法的探讨

探讨了温度对Ｏｌｓｅｎ法测定潮土速效磷的影响，结果表明，撮温度和速效磷浸出量之间呈极显著正相关，这种影响又与土壤速效磷贮量有关。根据统计分析得出比率（Ｐ２５／Ｐ１）与温度之间的有关参数，确定了包含土壤磷素水平影响在内的１０￣３０℃温度范围的经验校正式：Ｐ２５＝Ｐｔ（Ａ＋Ｂｔ）经检验，不同土样任意温度下测定值的校正值与２５℃时测定值无显著差异，符合试验要求。     

锑矿区大叶女贞重金属富集特性研究

为了选择重金属污染土壤生态修复植物,利用采样测试分析的方法,对生长于冷水江严重Sb、As、Cd、Hg污染土壤的大叶女贞进行了研究。结果表明:大叶女贞能耐较严重重金属胁迫,其生长量、生物量受影响较小,胸径、树高和生物量分别减少2.58%、6.07%、7.58%;大叶女贞对各重金属的富集系数均大于2,其中Hg、Cd的富集系数最大,Cu、As的富集系数最小;对各重金属的转运系数均大于60,其中Sb的转运系数最大,Zn的转运系数最小;各重金属在大叶女贞根、茎、叶器官内的富集量有极显著差异,根、茎、叶等器官间富集的重金属有极显著差异,其叶部富集重金属的顺序为ZnSbAsPbCuCdHg,茎部富集重金属的顺序为ZnSbPbCdAsCuHg,根部富集重金属的顺序为ZnSbPbAsCuCdHg,叶、茎、根三器官富集各种重金属的顺序为叶茎根,至少有93.0%重金属富集在叶、茎、枝等地上部器官,其中至少有60.0%的重金属富集在叶部;大叶女贞为一优良重金属污染土壤生态修复树种。     

论安徽现代农业物流体系的建设

针对安徽农业市场的物流需求,指出创建安徽现代农业物流体系的必要性和重要性。在明确现代农业物流内涵的基础上,分析当前安徽农业物流的产业基础、安徽农业物流存在的主要问题和面临的发展机遇,结合安徽实际从宏观和微观两个方面论述了建设安徽现代农业物流体系的构想。     

Genetic analysis of methionine content in indica-japonica hybrid rice (Oryza sativa L.) at different grain developmental stages

Genetics of methionine content in indica-japonica hybrid rice (Oryza sativa L.) was studied in 35 F₁ hybrids derived from crossing 7 male-sterile indica rice cultivars with 5 restorer japonica rice cultivars. Two genetic models and their corresponding statistical methods for quantitative traits of triploid endosperm in cereal crops were used for the analysis. One is the unconditional model, which refers to the analysis of cumulative measurements along the developmental stages, while another is the conditional model, which relates to analysis throughout the developmental stages. Results showed that methionine content of indica-japonica hybrid rice was controlled by expression of triploid endosperm nuclear genes, cytoplasm genes, diploid maternal plant nuclear genes, and their genotype-environment interaction effects. Dominant effects were important at the first three developmental stages, while additive effects were important at the next two stages of grain development under both unconditional and conditional analyses. With regard to the components of heritability, maternal and cytoplasm general heritabilities and their environmental interaction heritabilities were important. It was suggested that enhancing methionine content could be more efficient when selection is based on maternal plants in early breeding generations.     

对两个亚热带优质蛋白玉米群体的适应性混合选择研究：Ⅱ.相关响应

在两个源于亚热带的优质蛋白玉米（ＱＰＭ）群体，中群１３和中群１４中，对早开花性状进行４轮混合选择，籽 粒产量和植株形态特征发生显著的相关响应。１９８９至１９９１年在北京作的４年评价试验中，中群１３和中群１４平均每轮每亩籽粒产量分别增加４１．８（２８．７％）和４１．５ｋｇ（２９．０％）。与线性回归响应（ｂ＝３７．４和４０．４ｋｇ）相吻合。１９９１年在北京、济南、武功、成都和海南三亚作的５点联合试验中     

Genetic analysis of presence and absence of lint and fuzz in cotton

Cotton fibre mutants that were fuzzless and/or lintless were crossed with each other and a normal genotype (fuzzy, linted) to produce F₂ and BC₁ generations. F₂ segregation ratios from the cross of fuzzless‐lintless × fuzzy‐linted, for fuzzy‐linted, fuzzless‐linted and fuzzless‐lintless were 45 : 15 : 4. From the cross of fuzzless‐lintless × fuzzy‐linted, the F₂ segregation ratios were 9 : 39 : 16 whereas the BC₁F₁ segregation ratios from the F₁ backcrossed to fuzzless‐lintless were 1 : 3 : 4. These data suggest that the presence or absence of lint and fuzz are controlled by the interaction of four gene loci on non‐homologous chromosomes. We designate these loci as N₁, N₂, Li₃ and Li₄, where N₁ N₁ confers the presence of fuzzy, N₂N₂ confers inhibition of fuzzy initiation and development, and duplicate gene pairs, Li₃Li₃ and Li₄Li₄, determine the presence of lint. Homozygosity for li₃li₃ and li₄li₄ might also inhibit fuzz from development. In other words, they were recessive epistatic to fuzz genes.     

棱角山矾种子的休眠与萌发初探

棱角山矾种壳占种子风干重90.19%,种子透水性良好.浓硫酸处理1.5小时后,可使种壳减轻9.48%.硫酸处理增强了种子的透气性并减弱了种壳机械束缚力.添加500mg·L-1GA3溶液,经过1～5 ℃16h及20 ℃8h变温砂藏三个月后,可获得44%出苗率,而对照种子则颗粒不发.     

小麦种子在不同贮存条件下保存10年后生活力的差异

冬小麦农大139含水量为6.7%和11.8%。分别密封保存于室温和0～5℃冰箱。10年后,测定其发芽势,发芽率等指标,结果表明:①在室温条件下,含水量为11.8%的种子全部死亡,含水量为6.7%的种子有近50%的发芽率同保存前种子发芽率相比明显下降。②在0～5℃冰箱保存的种子,两种含水量均达到80%左右的发芽率,同保存前相比没有明显差别。统计分析表明,贮存温度及贮存温度和种子含水量的互作对贮存种子活力的影响达到极显著水平。     

农村住宅采暖技术试验研究

本文叙述了以太阳能采暖房为主体,利用连炕节柴灶余热作热源、吊炕为散热器的农村住宅采暖技术,它比仅靠太阳能采暖,室温提高3.49℃,12℃的采暖保证率达到90.33％。文中同时给出了该种采暖型式的热工参数设计模型和建筑结构模型。可供其它多种太阳能一常规能源综合采暖参考。