对晚稻高产施肥关键技术的几点探讨

本文以广东南雄市全安镇晚稻万亩高产创建示范片为案例,研究分析其施肥技术,而后对连作晚稻和单季晚稻的生育特点、施肥原则、施肥比例和施肥方法作了详细的分析,探讨了晚稻高产施肥的几点关键技术。

龙岩市永定区不同香型晚稻品种对比试验

为了初步筛选出适宜永定区种植的高产香型晚稻品种,促进本地“芋-稻”“菜-稻”“烟-稻”等水旱轮作模式中优质香稻的品种替换与更新,该研究于2023年晚季引进5个优质香型晚稻品种(“昱香两优香99”“良相优9816”“馥香两优8号”“馥香两优香99”“康香优8号”),以国审稻品种“天优华占”为对照,对参试品种的适应性、抗病性、丰产性进行考察。结果表明,参试品种“昱香两优香99”“良相优9816”“馥香两优香99”实割亩产分别为526.8、510.4、522.4 kg/亩,分别比对照品种减产5.6、22、10 kg/亩。“馥香两优8号”与“康香优8号”表现为较对照品种增产,增产幅度分别达到3.87%与3.04%,这两个品种的生育期适宜,株高适中,可以在当地进一步示范种植并推广应用。

Effects of Ratio of Row Spacing to Intrarow Spacing on Yield and Top Three Leaves of Super High-yielding Early and Late Rice

Using a split plot design, super high-yielding early rice ＆quot;Zhongjiazao 17＆quot;and ＆quot;Ganxin 203＆quot; and super high-yielding late rice ＆quot;Ganxin 688＆quot; and ＆quot;Wufengy-ouT025＆quot; were taken as materials with planting density the same at 312 000 hil s/hm2, to explore the effects of RS/IS （Ratio of row spacing to intrarow row spacing） on yield, top three leaves morphological features and its relationship of them in 2011 and 2012. The results showed that, whether early or late rice, biomass, accumula-tion and apparent utilizing rate of nitrogen were lower in RS/IS5.0 （40.0 cm ＆#215;8.0 cm） treatment, but yield of rice was higher in RS/IS2.0 （25.0 cm ＆#215;12.8 cm） treatment;grain numbers per spike of rice was more in RS/IS2.8 （30.0 cm＆#215;10.7 cm） treatment, and thousand-grain weight of rice was higher in RS/IS1.3 （20.0 cm＆#215;16.0 cm） treat-ment. For 4 varieties of early or late rice aforementioned, basal angle, opening an-gle and leaf area of 2nd leaf from top were larger in RS/IS5.0 treatment, and basal angle and opening angle were smal er in RS/IS2.0 treatment and leaf area smal er in RS/IS1.3 treatment.

Correlation,Regression and Path Analysis between Yield Traits and Yield of Yongyou No.9

[Objective] The research aimed to understand the high and efficiency technique in intersubspecific hybrid rice Yongyou No.9.[Method] We conducted the correlation analysis,regression analysis and path analysis of intersubspecific hybrid rice Yongyou No.9 based on the data of its ear,grain and weight at different yield levels.[Result]The performance of ear,grain and weight in Yongyou No.9 showed significant difference among different yield levels.The enhancement of effective ears would restrain the number of per ear total grains.It was found that the direct contributions of main economic traits to yield were determined to be per ear total grainseffective earseed setting rate1 000-grain weight.[Conclusion]The high-yield and effective cultivation techniques were suggested as follows：on the basis of certain effective ear number,grain number per ear should be mainly focused with a consideration to 1 000-grain weight.

Approach to the Ways for High-yielding Technique of Zhongzheyou No.8

[Objective] The paper was focused on the way how to increase the yield of hybrid rice Zhongzheyou No.8. [Method] The relationship among yield-related traits and their contribution to yield were investigated through correlation analysis, regression analysis and path analysis. [Result] The performance of ear, grain and weight in Zhongzheyou No.8 showed significant difference among yield levels. The enhancement of effective ears would restrain the number of total grains per ear. It was found that the direct contributions of main economic traits to yield were： number of fil ed grains per ear 〉 number of effective ears 〉1 000-grain weight 〉number of total grains per ear. [Conclusion] The promotion of high-yielding techniques was suggested as fol ows： on the basis of certain number of effective ears, number of fil ed grains per ear should be mainly focused with a consideration to grain weight.