纸浆

In order to assess the change of triploid populus tomentoza pulp plantation long-term-site productivity, The paper studied on effects of aboveground litterfall, fine root turnover and wet dust precipitation in nutrient cycling of triploid populus tomentoza pulp plantations at different ages,namely 2a、4a、5a、6a.It studied influence of different factors on decomposition of leaf、tree bark and twig of triploid populus tomentoza to select the operations to accelerate the decomposition and nutrient release. Finally, it studied influence of different intercrops on plantation site productivity and the relationship of intercrops and triploid populus tomentoza to select suitable intercrops. The main results as follows:(1)The aboveground litterfall of triploid populus tomentoza increased along with age from 216.03±59.7gm~(-2) at 3a to 482.38±101.3gm~(-2) at 7a, The N returned by litterfall wasl8.38±2.46kg.hm~(-2)a~-121.63±2.25kg.hm~(-2a~-139.51±4.61kg.hm~(-2a~-138.89±4.89kg.hm~(-2a~(-1) at 3a、5a、6a、7a respectively. The P returned by litterfall was 5.80±0.62kg.hm~(-2)a~(-1)、8.16±0.94kg.hm~(-2)a~(-1), 11.31±1.33kg.hm~(-2)a~(-1)、11.76±1.37kg.hm~(-2)a~(-1) at 3a、5a、6a、7a respectively. The nutrient returned by fine root turnover increased along with age, too. The N returned by fine root turnover was 3.85±0.41kghm~(-2)a~(-1)、5.22±0.63kghm~(-2)a~(-1),7.62±0.89kghm~(-2)a~(-1),9.17±1.22kghm~(-2)a~(-1) at 3a、5a、6a、7a respectively. The P returned by fine root turnover was 0.73±0.07kghm~(-2)a~(-1)、1.69±0.09kghm~(-2) a~(-1)、1.92±0.31kghm~(-2)a~(-1)、1.96±0.21kghm~(-2)a~(-1) at 3a、5a、6a、7a respectively. The leaf was the principal pathway to return nutrient to soil among litterfall, fine root turnover and wet dust precipitation. The proportion of returned N by leaf was 74.84%、71.96%、78.58%、75.03% at 3a、5a、6a、7a respectively,The proportion of returned P by leaf was 85.93%、80.31%、83.04%、83.23% at 3a、5a、6a、7a respectively. Therefore, it is important to protect and utilize the leaf in order to maintenance and enhance the long-term-site productivity of triploid populus tomentoza pulp plantation.

本文采取时序研究法，以3a、5a、6a、7a共4个不同年龄的三倍体毛白杨纸浆林为对象，研究了地上凋落物、细根周转、湿沉降在林分N、P营养元素循环中的作用及不同年龄林分N、P营养元素循环的特征，以评价三倍体毛白杨纸浆林长期立地生产力的变化；采取网袋法研究了不同因素对落叶、树皮、树枝分解的影响，以确定加快其分解、促进养分释放的措施：同时研究了不同间作物对林地影响、林木与间作物之间关系，以选择能维持立地生产力的合适的间作物种类等内容，得到以下结论：(1)随着年龄的增加，三倍体毛白杨地上凋落物的数量从3a的216.03±59.7gm~(-2)增加到7a的482.38±101.3gm~(-2)，通过凋落物归还的N分别为：3a时为18.38±2.46kg.hm~(-2)a~(-1)，5a时为21.63±2.25kg.hm~(-2)a~(-1)，6a时为39.51±4.61kg.hm~(-2)a~(-1)，7a时为38.89±4.89kg.hm~(-2)a~(-1)，归还的P分别为：3a时为5.80±0.62kg.hm~(-2)a~(-1)，5a时为8.16±0.94kg.hm~(-2)a~(-1)，6a时为11.31±1.33kg.hm~(-2)a~(-1)，7a时为11.76±1.37kg.hm~(-2)a~-1随着年龄的增加，通过细根周转归还的养分也在增加，归还的N分别为：3a时3.85±0.41kghm~(-2a~(-1)，5a时5.22±0.63kghm~(-2)a~(-1)，6a时7.62±0.89kghm~(-2)a~(-1)，7a时9.17±1.22kghm~(-2)a~-1归还的P分别为：3a时0.73±0.07kghm~(-2a~(-1)，5a时1.69±0.09kghm~(-2)a~(-1)，6a时1.92±0.31kghm~(-2)a~(-1)，7a时1.96±0.21kghm~(-2)a~-1从地上凋落物、细根周转、湿沉降三种不同途径归还林地养分所占的比例来看，地上凋落物中的落叶是归还养分主要途径，年龄在3a、5a、6a、7a时，通过落叶归还的N所占比例分别为74.84%、71.96%、78.58%和75.03%，归还的P所占比例分别为85.93%、80.31%、83.04%和83.23%。

The pulps obtained have a high brightness value and a degree of polymerization close to the raw pulps.

获得的纸浆具有高的亮度值和接近于原纸浆的聚合度。

The experiments on the catalytic gasification of pulverized Fujian Longyan anthracite by using black liquor as the catalyst and oxygen enriched mixing gas(oxygen enriched air/steam) as the gasification medium were carried out in a bench-scale fluidized bed reactor.

在实验室小型流化床反应器中研究了福建龙岩无烟粉煤纸浆黑液富氧催化气化的特性，考察了纸浆黑液催化剂添加量不同时氧体积分数变化对碳转化率、产气率、煤气组成与热值的影响。

While the up-flow reactor is the key equipment in medium- and high-consistency clean bleach process, including oxygen delignification、hydrogen peroxide bleach、chlorine dioxide bleach、 ozone bleach, the flow characteristics of the medium consistency pulp in up-flow reactor have significant impact on the quality and the efficiency of the bleach reaction. In this work, a series of equipments are designed and manufactured for a systematic and deep study on the flow characteristics of the medium consistency pulp in up-flow reactor.

而升流式反应器是中高浓清洁漂白工艺（包括氧气脱木素、过氧化氢漂白、二氧化氯漂白、臭氧漂白等工艺）中的大型关键设备，中浓纸浆在升流式漂白反应器中的流动特性与漂白反应的质量、效率都有密切关系，因此本研究自行设计和制造了相关的实验设备，对中浓纸浆在升流式反应器中的流动特性进行了较为系统、深入的研究。

Can be used for chemical pulp, semi-chemical pulp production, can be used for mechanical pulp waste paper pulp production, is widely used in Liner Board, corrugated paper, cultural paper, newsprint, toilet paper production, especially in purification of waste pulp, semi-chemical method Straw better.

既可用于化学浆、半化学浆的生产，又可用于机械浆废纸浆的生产，广泛应用于箱板纸、瓦楞纸、文化纸、新闻纸、卫生纸的生产中，尤其是净化废纸浆、半化学法草浆效果更佳。

In addition, the gifted Yue sold pulp using environmentally friendly products for one year the growth of natural plants (reed, sugar cane, rice and wheat grass) fiber pulp as raw material with non-toxic harmless, high-temperature non-deformation, non-leakage, renewable building paper and can become the natural degradation of soil organic fertilizer, the characteristics of return to nature.

除此之外，优怡所销售的纸浆环保产品采用一年生长的纯天然植物纤维纸浆作为原料，具有无毒无害，高温不变形、不渗漏，可再生造纸且可自然降解泥化成为有机肥料，回归大自然的特点。

Pulp mold packaging product is a kind of elaborate paper product, which is made of pulp of waste paper or plant fibred. Using metal mold with lots of very small mesh and bringing proper pumping pressure to make the pulp cling to the metal mold, the pulp mold product is shaped after being dewatered, taken out of mold, drying and formed with hot pressure.

纸浆模塑包装制品是采用一定浓度的纸浆或植物纤维浆，通过具有大量网孔的金属模具，利用一定形式的吸附压力使纸质或植物纤维均匀地沉积在模具外表面上，经脱水、脱模、烘干及热压整形而制成的较精细的纸模产品。

The influence of the technological parameters in mild chemical pretreatment process of OCC pulp on the pulp quality was discussed, and the beatability of OCC pulp with suitable chemical pretreatment was also researched in laboratory.

通过对OCC纸浆采用轻度化学预处理时相关工艺参数对浆张物理强度性能影响的研究，得出了适宜的预处理工艺参数，进一步研究了化学预处理过程对OCC纸浆的打浆性能和保水性能的影响。

When the pulp of the tooth is dying or has died, the pulp chamber becomes infected.

当纸浆的牙齿是垂死或已死亡，纸浆商会成为感染。

This equipment is designed for characteristic of the impurity in the recycled paper pulp in order to promote the flowing type structure, can apply various kinds of abolish screen , precise sift and screening , thick liquid of material before the paper machine of paper pulp extensively, having incomparable good working performance and dependability, it is various kinds of domestic pressures that are sifted and used in the recycled thick liquid the update products dealt with.

该设备针对再生纸浆中杂质的特性设计为升流式结构，可广泛应用于各种废纸浆的粗筛、精筛及纸机前浆料的筛选，具有无可比拟的良好工作性能和可靠性，是各种国产压力筛用于再生浆处理的更新换代产品。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。