不同喷施物对‘绿岭’核桃果实日灼及坚果品质的影响

以‘绿岭’核桃为试材,研究了喷施0.2%KH2PO4、(1%熟石灰+0.1%盐)、(0.1%,0.2%,0.3%)VC及(3%,6%,9%)高岭土对果实日灼及坚果品质的影响。结果表明:喷施0.3%VC、(3%,6%,9%)高岭土和0.2%KH2PO4的果实日灼率极显著低于CK,分别为7.57%,7.17%,6.57%,6.52%,7.04%,10.58%;喷施0.3%VC、(3%,6%,9%)高岭土和0.2%KH2PO4的果实日灼病情指数极显著低于CK和0.1%VC溶液,分别为4.58%,4.43%,3.86%,3.72%,4.61%,6.34%,6.31%。喷施0.2%KH2PO4的坚果横径显著高于喷施0.1%VC和9%高岭土,分别为3.21,3.07,3.06cm;喷施0.2%KH2PO4、CK、0.3%VC、(1%熟石灰+0.1%盐)、(3%,6%)高岭土的坚果三径平均极显著高于0.1%VC、9%高岭土,分别为3.38,3.36,3.35,3.34,3.37,3.33,3.26,3.23cm;不同喷施物对于坚果纵径、侧径、单果重、出仁率均无显著影响。喷施0.2%KH2PO4和0.3%VC的核仁可溶性蛋白含量显著高于3%高岭土,分别为2.35%,2.38%,1.81%;喷施(0.1%,0.2%)VC的核仁总蛋白含量显著高于9%高岭土溶液和CK,分别为20.23%,20.31%,17.12%,17.26%;不同喷施物对核仁脂肪含量无显著影响。

应用叶面喷施物提高套袋鸭梨果实内在品质的研究

实验表明,多效素等4种叶面喷施物均有提高套袋果实含糖量的作用,其原因是它们可增加叶片厚度及叶绿素含量,提高叶片光合速率,同时还降低套袋鸭梨果实的过氧化物酶活性及呼吸强度。其中叶肥1号和多效素在提高光合作用效果方面效果显著,而氨基酸复合微肥及云大-120则在降低呼吸强度方面效果较突出。

花后喷施外源物质对不同粒型品种子粒灌浆和蛋白质含量的影响

小麦不同粒型品种花后喷洒植物生长调节剂和N-P-K营养液后,籽粒中蛋白质的含量呈增加趋势,处理后,兰考8679处理的蛋白质含量在籽粒灌浆前期、中期、后期表现为高-低-高的变化趋势,而对照蛋白质含量在灌浆期表现比较平稳;温麦4号处理后籽粒蛋白质表现为前期高,中后期平稳,而对照表现为高-低-高的变化趋势。处理后粒重越高,这种趋势越明显。

提高鸭梨品质综合配套技术

提高鸭梨品质综合配套技术１早施基肥增磷控氮保三水秋季果实采收前后早施基肥，肥源不足的可春季补施。施肥方法为沟施、穴施或地面撒施。施肥量为１ｋｇ果１ｋｇ肥。追肥为穴施或地面撒施，翻入地下，然后灌水。氮肥要在６月前施足，６月后控制使用。为提高果实品质，要...

Effects of Spraying Plant Nutrient, Slaked Lime and Pokeberry Root Powder on Cadmium Reduction in Rice

The pot experiment was carried out in this study to further explore the impact of plant nutrient, slaked lime, pokeberry root powder on cadmium （Cd） absorption by rice, and to screen practical agronomic measures which could reduce the accumulation of cadmium. In the control treatment nothing but water was sprayed into rice, while in other treatments, plant nutrient, slaked lime and pokeberry root powder were sprayed on rice at the tillering stage, the heading stage and the dough stage, respectively. The plant samples and soil samples were collected after the harvest and then analyzed on aimed indexes. The results showed that Cd contents in rice plants were significantly decreased, total Cd contents in brown rice were significantly （P〈0.05） decreased after rice was sprayed with plant nutrient, slaked lime and pokeberry root powder at different growing stages. However, while rice was sprayed with the three materials all at the tillering stage, the heading stage and the dough stage, the total Cd contents in brown rice were decreased by a maximum reduction that was 53.4% to 57.5% below that of the control, which was signifcantly （P〈0.05） lower than other treatments. Meanwhile, the biggest reduction of Cd inrice sprayed with the three materials at the tillering stage was 19.6% to 35.1% below that of the control, which was signifcantly （P〈0.05） lower than other treatments. In conclusion, spraying plant nutrient, slaked lime and pokeberry root powder on rice at different growing stages could not only reduce the absorption accumulation of Cd by root system, but also change the activities of rice and physical and chemical properties of soil, and then inhibit the absorption of Cd by the root system and the transfer of Cd in the rice plant. Therefore, the multiple factors may be the main causes of reducing Cd contents in the brown rice when the three materials are sprayed on rice at different growing stages.

Quality and Nutrition of Pummelo as Influenced by Potassium

This study aimed to determine the influence of different rates of K （potassium） and K foliar application on the quality and plant nutrition condition of 13-year old ＇Magallanes＇ pummelo trees [Citrus maxima （Burm. ex Rumph.） Merr.]. The experiment was conducted at SODACO （South Davao Corporation） farm, Davao City, Philippines from March to October 2010. Five treatments with increasing K levels were applied per tree： control, no K, 150 g K basal, 225 g K basal and 225 g K basal ＋ foliar application. Application of 225 g K rates positively influenced fruit quality of pummelo. Fruit pulp diameter and juice weight increased while peel thickness decreased. The 225 g K rates also increased juice pH, TA （titrable acidity） and TSS （total soluble solids） per tree. The yield of total phenol, flavonoid, vitamin C and oil per tree increased with 225 g K application. Results of the soil analysis before and after the conduct of the study showed an evidence of fertilizer absorption by the trees. It was also observed that foliar fertilization reduced soil acidity. This indicates the important role of K in improving the nutrient utilization and quality of ＇Magallanes＇ pummelo.

Effect of Foliar Application of Iron on Seasonal Changes of Minerals Composition in Petioles and Berries of Halwani Lebanon and Kamali Grape Cultivars （Vitis vinifera L,）

A field experiment was conducted in 2009 and 2010 growing seasons, to study the effect of foliar application of iron-chelated ＂Fe-EDTA＂ at concentration 0, 100 and 200 mg/L on the seasonal dynamic of mineral composition of N, P, K, Fe and Zn in petioles and berries of Halwani Lebanon and Kamali grape cultivars, grown on a calcareous soil in Mosul region, Iraq. The results revealed that the foliar application of 200 mg Fe/L caused a significant increase of N, P, K, Fe and Zn concentrations in petioles and berries compared with the control for both seasons. Additionally, the N, P, K, Fe and Zn concentration in petioles were high at the beginning of the growth season, whereas, decrease towards in the end of the growth season in both cultivars and seasons. While the N, P, K, Fe and Zn in berry content was increased towards from berry set to veraison and ripening stage in both cultivars and seasons. So there are various element contents in the cultivars.

Effect of Spraying Nutritional Solution ＂PRO.SOL＂ and Chelated Iron on Growth and Flowering of Gazania Plant Gazania splenden L,

The aim of this research was to study the effect of spraying nutritional solution ＂PRO.SOL＂ and chelated iron on vegetative and floral growth characteristics on Gazania plant. Randomized Complete Block Design （R.C.B.D） was adopted utilizing two applications in three replicates. Three concentration levels of nutritional solution PRO.SOL （10.00, 5.00 and 0.00 mg/L） and four concentration levels of chelated iron （90.00, 60.00, 30.00 and 0.00 mg/L） were applied in this experiment. The interaction between the two factors was also measured. The mean values were compared using L.S.D test at probability level 0.05. Spraying PRO.SOL at concentration 10.00 mg/L or chelated iron concentration level 90.00 mg/L improved growth parameters. There was significant increase in： number of total leaves per plant, shoot dry weight, leaves total chlorophyll content, number of off-shoots, number and length of primary roots, length of the peduncle, number of flowers, number of petals and flower dry weight. Meanwhile leaf carbohydrate contents, phosphorus percentage and leaf iron content were increased significantly compared with the （unsprayed plants）. The interaction treatment, spraying nutritional solution PRO.SOL at concentration level 10.00 mg/L with 90 mg Lt chelated iron had a significant increase in all studied growth parameters, i.e., the number of flowers and petals gave 8.33 flowers and 18.67 petals compared with the control treatment which gave 3.33 flowers and 13.00 petals. Meanwhile leaf carbohydrate contents, phosphorus percentage and leaf iron content increased significantly in comparison with the unsprayed plants which gave the least values.

Response of Peach （Prunus persica） cv. to Foliar Application of Potassium and Copper

The experiment was carried out in a private orchard situated at Atrush town, Duhok Govemorate Kurdistan Region-Iraq during 2011 season to study the effect of foliar application of three concentrations of potassium （0.0%, 0.5% and 1%） and three concentrations of copper （0.0%, 0.02% and 0.04%） on an eight years old peach cultivar, planted in clay soil, spaced at 4.0 m x 4.0 m. The foliar application was done twice, on April 24, 2011 and May 25, 2011. The results showed that spraying of potassium at both concentration （0.5% and 1%） or copper at high concentration （0.04%） had a positive effect on leaf area, leaf fresh weight, leaf dry weight, total chlorophyll, fruit weight, fruit number and yield per tree as well as fruit diameter, pith thick, pulp weight, seed weight and total soluble solid. The interaction between potassium and copper significantly enhanced all detected traits, since trees receiving 1% and sprayed with 0.04% of copper was characterized by the highest values of all growth and yield characteristics compared to the lowest values at untreated trees （control）.

Relationships between altitudinal gradient and plant carbon isotope composition of grassland communities on the Qinghai-Tibet Plateau,China

Foliar and root carbon isotope composition(δ13C) of grassland communities on the Qinghai-Tibet Plateau,China,was obtained by the biomass weighting method and direct measurement.We investigated the characteristics and altitudinal patterns of foliar and root δ13C and determined which environmental factors influenced foliar δ13 C most.Foliar δ13 C of alpine steppe was significantly higher than that of alpine meadow and temperate steppe.For alpine meadow,root δ13C was significantly higher than of foliar δ13C.Foliar δ13C increased with altitude at an average rate of 0.60‰ km 1 for the whole grassland ecosystem.This rate was lower than that at species level.However,there were no significant relationships between root δ13C and altitude.Atmospheric pressure was a more important factor than temperature and precipitation in its influence on the altitudinal pattern of foliar δ13C at the community level.