Preparation of Tartary Buckwheat Seed Coating Agent and Its Effect on Germination

To mitigate the wastage of seed resources and reduce the usage of pesticides and fertilizers, seed coating agentshave gained popularity. This study employs single-factor and multi-index orthogonal experimental design methodsto investigate the seed coating formula and physical properties of Tartary buckwheat. The specific effects ofeach component on Tartary buckwheat seed germination are analyzed. The findings reveal that the seed coatingagent formulated with 1.5% polyvinyl alcohol, 0.15% sodium alginate, 0.2% op-10, 0.1% polyacrylamide, 8% colorant,3% ammonium sulfate, 1% potassium dihydrogen phosphate, and 0.15% carbendazim exhibits the mosteffective coating. It demonstrates optimal physical properties and promotes seed germination efficiently. The suspensionrate of this seed coating agent reaches 91.12%, with a mere 2.13% coating shedding rate and 2.5% coatingseed rot rate. Furthermore, it achieves a germination percentage of 99.17%, which is 20.84% higher than the lowestgroup. The germination potential and index are also significantly higher than the lowest group, with anincrease of 20.84% and 26.56%, respectively. Additionally, the vitality index is 553.08, a 15.75% increase comparedto the lowest group. The application of seed coating agents helps reduce seed resource loss, increase plant numbers,and ultimately enhance agricultural yields. This finding holds practical significance in agriculturalproduction.

Effect of Trace Elements in Seed Coating Agent on Peanut Growth

[Objective] This study aimed to investigate the effect of trace elements in peanut seed coating agent. [Method] Different concentrations of trace elements Fe and B were added into peanut coating agent, then the germination rate and plant height of the seeds treated by different agents were measured to decide the best formula. [Result] The germination rate and plant height of the seeds treated with seed coating agent was obviously increased. Adding trace elements Fe and B could increase the peanut yield, and 1.5% Fe and 1% B gave the best result. [Conclusion] This study will provide reference for modifying the seed coating agent formula.

Preparation of a Novel Highly Effective and Environmental Friendly Wheat Seed Coating Agent

A novel environmental friendly wheat seed coating agent was prepared from the natural polymer,biological pesticide,microfertilizer,microelements and other additives.The laboratory and field test results showed that it could enhance the yield up to 16% and reduce its input cost to 1/6 as compared with the conventional wheat seed coating agent.It is safe without causing any pollution and would have significant economic and environmental benefits.

Effect and Mechanism of Cold Tolerant Seed-Coating Agents on the Cold Tolerance of Early Indica Rice Seedlings

To better understand the effect and mechanism of cold tolerant seed-coating agents on the cold tolerance of rice seedlings, the physiological and biochemical effects of four cold tolerant seed-coating agents （HET, YKJ, YKZYJ, and the ABA seed coating agents） on two early indica rice varieties were studied under chilling stress. The results showed that the rice seedlings treated with cold tolerant seed-coating agents under chilling stress maintained dramatically higher root vigor, POD, CAT and SOD activities, and chlorophyll content, had lower MDA content and electrolyte leakage, and accumulated more soluble sugar and free proline, when compared with the control without the treatment, and finally showed lower plant injury rate. It was indicated that the cold tolerant seed coating agent improved the ability of rice seedlings in resisting to chilling stress. YKZYJ was ranked the first in terms of the efficiency in cold tolerance among the four cold tolerant seed-coating agents tested.

Physicochemical Property Testing of a Novel Maize Seed Coating Agent and Its Antibacterial Mechanism Research

We used the no pollution natural polymer polysaccharide chitosan as the main raw material, which is supplemented by other additives, to prepare a high-efficiency environmental friendly maize seed coating agent. By detecting the seed quality, maize seedling indexes, which include root activity, chlorophyll content and malondialdehyde (MDA) content, and through the results we found that this seed coating agent could improve the photosynthetic capacity and enhance seedling resistance. Laboratory bacteriostasis test and study showed that the antibacterial rate of this seed coating agent has reached more than 88%. Meanwhile, we analyzed and studied the antimicrobial mechanism of the seed coating agent.

Influence of Different Chelating Agents on Corrosion Performance of Microstructured Hydroxyapatite Coatings on AZ91D Magnesium Alloy

To improve the bioactivity and corrosion resistance of AZ91 D magnesium alloy,hydroxyapatite（HAp） coatings with novel microstructured morphologies were prepared successfully on AZ91 D substrates via a facile hydrothermal method.Different chelating agents including polyaspartic acid（PASP） and ethylenediaminetetraacetic acid（EDTA） were introduced to investigate their effects on the morphology and corrosion resistance of the coated magnesium alloys.The results revealed that the coating prepared with PASP was composed of many uniform urchin-like microspheres,while the coating prepared with EDTA consisted of many flower-like particles.Moreover,the crystallinity of the coating prepared with EDTA was much higher than that of the coating prepared with PASP.Electrochemical tests revealed that the corrosion resistance of the substrate was significantly improved after being coated with each coating.Immersion test of the coated samples in simulated body fluid（SBF） demonstrated that the coatings could be biodegraded gradually and induce the formation of calcium phosphate particles.

Preparation of a Novel Environmental Soybean Seed Coating Agent

In the study, a novel environmental soybean seed coating agent was made of natural polymer, trace elements, trace fertilizer and biopesticides etc., with the condition of high performance-to-price ratio and environmental friendliness. Effects of this soybean seed coating agent on soybean yield were tested through the laboratory and farm experiments. The tested results showed that the soybean yield using this seed coating agent was increased by 15.46%, and its cost was decreased by 27.8%, compared with the conventional soybean seed coating agent. It’s nontoxic and harmless to human and animals, more friendly to the environment. So it has obvious economic and environmental benefits.

Study on a new nano-dispersing agent and its effect for increasing suspension ability of alcohol-based coatings

A study for further improving the suspension rate of alcohol-based coatings using a new nano-dispersing agent has been presented in this paper. The results of experiments show that the new nano-dispersing agent should be used in combination with organic auxiliary agent which significantly increases the suspension effect of alcohol-based coatings. By the methods, the suspension rates of 99%, 98%, 96% and 94% can be achieved at 2h, 2h, 48h and 72h, respectively. These alcohol-based coatings have characters of higher strength, lower gas evolution, better brush ability and no blister after ignition.

THE ROLE OF RARE EARTH CHLORIDES IN THE PACK-TiC COATING AGENT

If 1% rare earth chloride is added to the coating agent containing 5% AlCl_3,the coating efficiency of TiC will be increased greatly.A protective crust consisting of Al_2(SiO_3)_3 and SiO_2 will form on top of the coating agent in the temperature range of 850～1000℃ when SiO_2 powder of a thickness of 5～10 mm is spread on top of it.The protective crust can offer a good air-proof property and increase the denseness of the coating structure.

Effects of Different Seed Coating Agents on the Quality of"Grey-matter"Hybrid Rice Seeds

[Objectives]This study was conducted to select suitable mixed seed coating agents for improving the quality of"grey-matter"hybrid rice seeds.[Methods]Three different mixed seed coating agents(A,B,C)were used to coat the seeds of two varieties(Taiyou 390 and Zhenliangyou 8612)of hybrid rice with different"grey-matter"content(5%,15%,25%),and the results were investigated and compared.[Results]The combinations of treatment B(seed coating agent A+Linong)and treatment C(Manshijin+seed coating agent A)could significantly improve indexes including seed germination potential,germination rate,seed vigor,seedling height,fibrous roots and fresh weight of the two varieties with a"grey-matter"content greater than 15%,but had no significant effects on main root length,dry weight,leaf number and tiller number,and the effects of treatment B was better than those of treatment C.That is to say,mixed seed coating agent B(seed coating agent A+Linong)was suitable for use as a seed coating agent to improve the quality of"grey-matter"seeds.[Conclusions]This study provides a reference plan for the safe use of mixed seed batches with"grey-matter"deterioration.

PREPARATION AND PROPERTIES OF THERMOSETTING ACRYLIC COATINGS USING TITANIUM-OXO-CLUSTER AS A CURING AGENT

Thermosetting acrylic coatings were prepared by using carboxyl acid group-containing acrylic oligomer and curing with titanium-oxo-clusters which were first pre-hydrolyzed from titanium n-butoxide.The curing ability of the titanium-oxo-cluster was examined using a microdielectric analytical(DEA)curing monitor,Fourier transformed infrared spectroscopy(FTIR),and Soxhlet extraction experiments,and the properties of the resulted coatings were investigated with pendulum hardness tester,dynamic mechanical analysis(DMA),thermogravimetric analysis(TGA)and ultraviolet-visible spectrometer.The effect of titania-oxo-cluster in leading acrylic oligomers to form thermosetting acrylic coatings was confirmed.An increasing pendulum hardness and modulus of acrylic coatings with increasing titania content was observed, which resulted from the increment of crosslinking degree rather than of the titania content.The thermosetting acrylic/titania coatings also showed better thermal stability and higher UV-blocking properties than those coatings using organic curing agent.

Activity test and mechanism study of an environmentally friendly wheat seed coating agent

This novel environmentally friendly wheat seed coating agent which has been made with natural polymer as the primary material could increase yield by about 9% compared with the conventionally virulent wheat seed coating agent. In the premise of this production, the content of malondialdehyde (MDA) and peroxidase (POD) was determined. The results show that, after treated by the self-made wheat seed coating agent, the contents of the MDA were less than traditional group and the blank control group and POD contents were higher than traditional group and blank control group, this provides a good foundation on the further research of self-control wheat seed coating agent.

环保耐温抗盐型包被剂coater-10的研制与应用

国内使用的钻井液包被剂主要为有机高分子类,存在适用性单一、耐温抗盐性不够理想、环保性能不满足相应国家标准要求等不足。以生物聚合物为主要合成单体,并加入非离子、阴离子及阳离子单体,采用水溶液聚合制备得到了环保耐温抗盐型包被剂coater-10。结果表明,合成的包被剂coater-10能提高钻井液黏度和动切力,降低钻井液失水量,同时具有较好的耐温抗盐性;铬、汞等主要重金属含量都在GB 4284—84标准要求的限值范围内;急性生物毒性检测EC_(50)值>30 000 mg/L,对环境影响小;生物降解性BC值为20.1,可生物降解,有助于提高钻井液体系整体的环保性能。以coater-10作为环保型海洋钻井液体系的1#配方满足了现场钻井工程要求,同时具有优良的环保性能,减少了对作业区域海洋环境的污染。

强力包被剂COATER在沙埝地区的应用

江苏油田苏北地区上部三垛组泥岩易吸水膨胀、分散,下部阜宁组泥页岩易吸水掉块垮塌,在钻井过程中时常出现缩径、起下钻拔活塞、下钻遇阻、大段划眼等复杂情况,影响钻井效益及井下安全。Coater乳液具有较大的分子量,一般为1000万-1500万,能有效地将钻屑包被好,有利于固控设备将钻屑清除。强力包被剂Coater提高了钻井液的抑制性,使泥岩的水化分散得到有效控制,钻井液性能稳定,处理剂加量少;井壁稳定性好,井径规则;更利于实现低固相和减少滤液侵入地层,保护油层效果好;Coater单独使用时钻井液滤失量大,泥饼质量羞,与PMHA-Ⅱ和FA-368复配使用后,钻井液性能较易控制,维护处理简单,膨润土含量低;Coater乳液直接加入钻井液申,利用率高,减少了浪费。

硅烷偶联剂对膨胀型阻燃聚丙烯耐水性、力学性能的影响

以聚丙烯(Polypropylene,PP)为基体,加入膨胀型无卤阻燃剂FR-1420制备得到了无卤阻燃PP材料,改变硅烷偶联剂的添加量得到了不同的无卤阻燃PP样品,考察了硅烷偶联剂添加量对PP样条阻燃性能与力学性能的影响,结果表明:阻燃剂FR-1420的加入能显著提高PP的阻燃性能,FR-1420质量分数达到10%时,材料3.2 mm样条即可达到UL-94 V-0级;增加阻燃剂质量分数至20%,材料1.6 mm样条可以达到UL-94 V-0级;阻燃剂的疏水接触角由表面包覆前的0°提升到表面包覆后的123.24°,将阻燃PP材料放置在85℃、湿度85%的环境下240 h,未见阻燃剂析出到材料表面,且硅烷偶联剂的表面包覆提升了阻燃剂与PP材料之间的相容性,提高了PP材料的力学性能,且扫描电镜显示,FR-1420经过表面处理后与PP基体相容为一体,未见两者间界面。傅里叶变换红外光谱(FTIR)分析结果表明,FR-1420阻燃剂的表面成功改性接枝了硅烷偶联剂。

种衣剂防治小麦茎基腐病效果的评价

茎基腐病已成为黄淮小麦主产区最具破坏性的土传病害之一,对我国粮食安全供给构成严重威胁。目前抗茎基腐病主栽品种稀少,生产上主要依赖于化学农药措施。药剂拌种可以有效防治茎基腐病。综合评价现有的种衣剂对小麦茎基腐病的防治及增产效果,以期为合理用药提供依据。采取高感茎基腐病小麦品种郑麦1354为研究对象,播种前种子包衣晾干,利用高致病力茎基腐病菌株PY20-20培养小米菌谷,连续2个小麦生长季利用进行人工接种病圃,包衣种子和接种菌谷等重量混合播种,分别于小麦拔节期和乳熟期记载处理小区植株发病情况,调查9种种衣剂处理后不同生育期的病情指数(disease index,DI),成熟收获后测定小区实际产量,结合小麦产量相关性状,比较种衣剂防病增产作用。结果表明:种衣剂处理后拔节期茎基腐病DI值均小于1.0,显著小于空白对照(5.07),防治效果为85.09%~100%,其中33 g·L^(-1)咯菌·噻虫胺、9%苯甲·吡虫啉和35 g·L^(-1)精甲霜灵·咯菌腈的防效达到为97%~100%。在乳熟期,种衣剂处理后茎基腐病DI平均值低于15,显著小于空白对照(81.55),其中35 g·L^(-1)精甲霜灵·咯菌腈和9%苯甲·吡虫啉防效较好,平均防效分别达到92%和95%,而且分别增产39.62%和36.31%。综合而言,采用种衣剂35 g·L^(-1)精甲霜灵·咯菌腈和9%苯甲·吡虫啉防治小麦茎基腐病效果好且增产效果显著,具有较好的应用前景。

Ms Coat脱敏剂的临床疗效观察

目的观察Ms Coat治疗牙本质过敏的临床疗效。方法将患者随机分为2组。实验组采用Ms Coat脱敏剂涂擦,对照组采用氟化钠涂擦,进行牙齿敏感症的脱敏治疗。结果即时疗效、半年有效率:实验组分别为95.45%和71.28%,对照组分别为92.34%和65.21%。二者相比均有统计学意义(P<0.01)。结论Ms Coat对牙本质过敏的治疗具有较好的疗效,且操作简单、易学,适用于基层医院推广应用。

微生物种衣剂的研制及其对玉米茎腐病的防效评价

本研究通过平板对峙、种子发芽性状和室内盆栽试验,筛选对玉米茎腐病防效优良的木霉菌株,通过助剂理化性质测定、生物相容性分析及正交试验,明确助剂种类、用量和最佳组合,研制生物种衣剂,并进行玉米茎腐病防效验证。结果表明:从实验室保存的109株木霉中,筛选到17株木霉对禾谷镰孢具有较好拮抗活性,抑制率均>70%,6株木霉菌株对苗期茎腐病的防治效果最佳,防效80.33%~85.64%。分别以筛选的棘孢木霉Tr34和非洲哈茨木霉Tr35为活性成分,10^(6)厚垣孢子数/mL,辅以黄原胶0.2%,木质素磺酸钠2%,北农成膜剂1,5%,100 mg/mL链霉素1%,制备100万孢子/mL棘孢木霉生物种衣剂(简称Tr34生物种衣剂)和100万孢子/mL非洲哈茨木霉生物种衣剂(简称Tr35生物种衣剂)。两种生物种衣剂药种质量比例分别为1:200和1:100时,对苗期茎腐病的防效最好,分别为81.14%和83.18%。本研究研制的Tr34生物种衣剂和Tr35生物种衣剂可以有效降低玉米茎腐病的发生,为进一步田间应用奠定基础。

天津地区水稻恶苗病防治药剂筛选试验

天津市优质农产品开发示范中心开展水稻恶苗病防治药剂筛选试验。试验表明,17%杀螟·乙蒜素+80%乙蒜素对恶苗病的防效达100%,节本高效;经1万hm2以上生产实践检验,1 kg带菌种子用17%杀螟·乙蒜素5 g+80%乙蒜素0.6 ml浸种处理7~8 d,种水比1:1.1~1.2,恶苗病病株最少,仅个别种植户因操作不当本田零星出现恶苗病。