The 0-40cm soil layer soil mean value looked that mixes by the interlacing broadcasts the lawn soil ulmin, the alkaline hydrolysis nitrogen content to be highest; The fast-acting phosphorus, the fast-acting potassium are highest by the unicast awnless brome lawn content; The colleague mixes broadcasts lawn pH to be biggest.
5. 四川盆周山区猕猴桃耕地质量总体较差,土壤有效磷、速效钾、有效硼、有效钼等土壤养分缺乏,猕猴桃生产中普遍存在化肥施用过量、用肥结构不合理、施肥方法不当等问题。
Moreover, excessive fertilizer applying, unreasonable using structure and improper method, these problems catholically existed in kiwifruit production.
6. 四川盆周山区猕猴桃耕地质量总体较差,土壤有效磷、速效钾、有效硼、有效钼等土壤养分缺乏,猕猴桃生产中普遍存在化肥施用过量、用肥结构不合理、施肥方法不当等问题。
General quality of soil is poor, lacking of soil nutrients like available phosphorus, quick-acting potassium, available boron and molybdenum. Moreover, excessive fertilizer applying, unreasonable using structure and improper method, these problems catholically existed in kiwifruit production.
7. 结果表明,施用粘土-聚酯胶结肥和塑料-淀粉胶结肥均能显著增加冬小麦产量,与CK2相比分别增产14.85%、27.48%;施用胶结型缓释肥能够促进小麦各生育时期叶绿素合成;与CK2相比,施用粘土-聚酯胶结肥和塑料-淀粉胶结肥分别使小麦中后期干物重增加9.24%~45.56%和7.53%~45.64%;使植株内氮素含量分别增加4.43%~12.96%,5.70%~14.42%;与CK2相比,土壤中碱解氮和速效磷含量均表现为小麦生长前期低生长中后期高,充分体现了胶结型缓释肥的养分缓释效果。
Applying slow-release fertilizer felted by clay and by plastic increased yield by 14.85% and 27.48%, respectively. The chlorophyll content in leaf increased due to the application of felted slow-release fertilizer. Compared to CK2, applying felted slow release fertilizer could increase the dry weights of single plant at different stages as well. For slow-release fertilizer felted by clay and by plastic increased dry weight by 9.24%—45.50%, 7.53%—45.64%, respectively. The available N and P in the soil with the application of felted slow-release fertilizers were lower in earlier stage and higher in midterm and late stage than that of the control.
8. windbreak and dune fixation forest 光能利用率指标:生物量及其热值;防风固沙效益指标:减低风速,减少输沙量;小气候效应指标:湿度调节,温度调节,地表、地中温度调节;水分利用效率指标:1m沙层的有效含水量,固沙林蒸腾系数,因沙林造林密度;改良土壤效益指标:地表结皮状况,土壤毛管孔隙度,地被物盖度,增加土壤有机质含量,增加土壤全氮含量,增加土壤速效磷含量;种的群落优势度指标:种的重要值
Microclimate indicators:regulation of humidity, regulation of temperature and regulation of earth surface and subsurface temperatureIndicators of water use efficiency:available water content in 1m sand layer, transpiration coefficient of windbreak forest, afforestation density of windbreak forestIndicators of soil amelioration: situation of earth surface harden, degree of soil capillary aperture, coverage of understory, increase of soil total nitrogen, increase of soil available phosphorous content
9. 在各类型的胶林土壤中除速效磷、有机质含量部分上升外,其余各主要养分含量以下降的趋势为主,其中速效钾、碱解氮的下降较突出。
Soils developed from basalt are in lack of available phosphorus, available potassium, their exchangeable calcium and magnesium are the lowest of four type soils.
10. 结果]研究得出,果园土壤深层有机质含量显著降低,815龄果树的果园土壤有机质随生长年限的增加而减少;不同园龄土壤在40 cm以上土层有效氮和速效磷含量尽管有所增加,但氮和磷的供给能力仍在中下等水平;即使在富钙的石灰性土壤果园里,其土壤上层交换性钙含量变化幅度不大,而60 cm以下土壤交换性钙明显递减,土壤剖面有酸化趋势。
Results The results showed that the content of organic material in orchard soil in-depth was obviously reduced. With the age-increasing of the tree from 8-15 tree ages, the content of organic matter in orchard soil was reduced. Even though the available N and available P above 40 cm layers in the soil with different orchard ages were slightly increased, the capacity of N and P-providing was not high. The variation of exchangeable calcium content in soil upper layers was not obvious in the calcareous orchard soil which was rich in calcium. There was obvious reduction trendy in the exchangeable calcium content under 60 cm soil layers, which showed there was an acidification trend in soil.
11. 海南垦区胶林0-20cm的土壤中,碱解氮、速效磷、速效钾、有机质、pH值、交换性钙、交换性镁平均值分别为71.39mg/kg、4.75mg/kg、37.38mg/kg、1.74%、4.66、321.33mg/kg、46.69mg/kg。
Results showed that, in the soil of 0-20cm, the average value of alkali-hydrolytic nitrogen, available phosphorus, available potassium, organic matter, pH value, exchangeable calcium and magnesium are 71.39mg/kg, 4.75mg/kg, 37.38mg/kg, 1.74%, 4.66, 321.33mg/kg and 46.69mg/kg.
12. 结果表明:火烧3年后,桉林土壤有机碳、全氮、速效钾和pH含量明显降低,土壤有效磷、交换性镁、土壤净氮矿化速率和氨化速率降低,但不显著;火烧灌草坡除土壤交换性钙明显增加外,其他土壤养分均无显著变化。