不同插秧方式对水稻产量的影响

机械插秧对水稻根系伤害重,插深一致,插后返青慢,但是可以保证一定的苗数;人插植伤小,插后易缓苗,但是插秧时难保证插深、密度,人为因素难把握;钵育苗可增加单株生长空间,插后无植伤,提高带蘖率及促进秧苗分蘖早生快发,试验证明,钵育摆栽是最有效的增产增收栽培途径。     

园林经济新现象"大树进城"的利弊分析

通过对当前园林经济新现象"大树进城"利弊的分析,探讨了市场机制下有效解决问题的办法和途径.分别从园林经济的商品、经营和管理方面阐述了城市园林生产的产品结构、经营策略与管理模式.对当前宏观经济政策提出适当的宏观调控建议.     

漂浮育苗对西瓜苗移栽成活的研究

以西农9号为材料,研究了漂浮育苗法对西瓜苗移栽成活率的影响。试验结果表明,采用漂浮育苗法育出的西瓜苗在2叶1心期和3叶1心期移栽成活率高,达到95%以上,且缓苗期短;带基质移栽的成活率高于不带基质移栽的,移栽后浇水的高于不浇水苗,且缓苗期短：晴天、阴天、小雨天移栽3 d内的成活率均在90%以上,比传统土育苗移栽瓜苗缩短缓苗期3～4 d。     

南方芦笋组培苗移栽技术研究

以芦笋新品种“津宁”的生根组培苗为试验材料,通过移栽基质、基质消毒措施、生根培养类型及移栽时期对芦笋组培苗移栽成活率影响的研究。结果表明：在南方,冬、春两季采用二步生根法培养的生根组培苗,选用椰糠作为移栽基质、200g/m3根病治杀菌剂进行消毒处理,移栽成活率可达95.20%~99.25%。     

乔木大苗全冠移植初探

调查分析珠海市大苗移植的生长状况,提出全冠移植的技术措施。     

苹果砧木组培苗无根快速移栽技术研究

该研究提出一种介于普通扦插和生根移栽之间的新的苹果砧木组培苗无根快速移栽方法,组培苗转接于特定生根诱导培养基1/2 MS+IBA 2.0 mg/L,暗培养4~8 d后直接移栽至泥炭基质上,生根率达80%;移载至泥炭+蛭石(1∶1)基质上成活率达63.16%。该方法移栽成活率明显高于普通扦插方法,且省掉生根和炼苗两大步骤,节约时间25 d左右。     

不同插秧密度对水稻产量和品质的影响

将龙粳26和垦05-795两个品种进行不同插秧规格对比试验,结果表明:不同的插秧密度对水稻的产量有影响,对水稻的抗逆性、米质影响不显著。龙粳26最适宜的插秧规格是30 cm×10 cm,产量达到664.4 kg/667 m2,其次是26cm×13 cm,产量达到658.9 kg/667 m2;垦05-795最适宜的插秧规格是30 cm×10 cm,产量达到697.2 kg/667 m2,其次是30 cm×13 cm,产量达到672.0 kg/667 m2。     

Effect of cold storage treatments and transplanting stress on gas exchange, chlorophyll fluorescence and survival under water limiting conditions of Pinus radiata stock-types

The capacity of radiata pine seedlings to overcome planting shock in wet and dry conditions and their dependence on previous history was analysed by studying post-planting resumption of gas exchange and photochemical reactions, and survival 2 months later. Even under well-irrigated soil conditions, seedlings showed the effects of stress: gas exchange was reduced, but a clear difference between soil-plugged (PR) seedlings and bare-root (BR) seedlings was observed. Drought enhanced the severity of photosynthesis deprivation. Photochemical reactions, analysed by chlorophyll a fluorescence parameters, were not affected by planting shock in conditions of available soil water, but altered dramatically when drought stress was raised, suggesting structural damage of photosynthetic machinery. Despite the dramatic sensitivity of radiata pine to water availability, rewatering produced remarkable recovery, indicating good photosynthetic components repair capacity, which depended, however, on stock quality at the moment of planting. The ability of radiata pine to cope with drought in terms of post-planting performance depended on both storage conditions and water availability at the planting site. These findings provide information for tree physiologists and foresters as to how the management of radiata pine seedlings before planting can affect post-planting performance potential under wet or dry environmental conditions.     

木荷芽苗切根移栽育苗技术

木荷是我省造林的主要阔叶树种，木荷芽苗地奶移栽可使苗木粗壮，均匀，侧须、根发达；有利造林成活和林木速生丰产。     

章姬草莓组织培养苗移栽驯化影响因素的探讨

研究表明,组培苗驯化栽培基质种类及混合比例、基质消毒与否及消毒剂使用、湿度条件等因素对组培苗驯化栽培效果的影响均比较明显,采用草炭∶蛭石∶珍珠岩=2∶2∶1的栽培基质,并使用400倍多菌灵消毒处理,配合驯化移栽后的10～14 d用塑料膜搭拱棚覆盖保湿,移栽后保持相对湿度80%～90%的条件下,章姬草莓组培苗的驯化效果良好,移栽成活率达100%,且幼苗生长发育状况良好。