机械化深施肥技术及推广     

胡旺胜 《湖南农机》2016,(1)

机械化深施肥技术是作物施肥作业的技术创新,可提高作业效率、肥料利用率和作物产量.但机械化深施肥技术要达到普及推广,还须采取多种措施:加大推广示范和政策扶持力度,加强深施肥技术的农机与农艺配套研究,研究制定机械施肥作业技术标准;农机制造企业要提高产品性能和质量,提高设备使用的可靠性;同时,化肥生产企业也应参与研究,共同开发与深施技术配套的肥料.  相似文献   

氮磷钾不同施肥量对杨树菌根化苗生长的影响     

郭明秋 《北京农业》2011,(18):76-77

通过实验对氮磷钾不同施肥量对杨树菌根化苗生长的影响方面进行了初探。  相似文献   

硒肥与钝化材料组配对土壤Cd钝化及稻米Cd消减效果   总被引：1，自引：0，他引：1  

柴冠群  刘桂华  罗沐欣键  秦松  范成五 《中国农学通报》2021,37(32):102-107

为了探讨不同硒肥施用方式联合钝化材料对土壤镉钝化和稻米镉消减的效果,采用盆栽试验的方式,选用亚硒酸钠作为硒肥,钙镁磷肥和硅藻土作为钝化材料,设置基施硒肥+钙镁磷肥+硅藻土和叶面喷施硒肥+钙镁磷肥+硅藻土2种方式,研究其不同用量对镉污染酸性稻田土壤修复与安全利用的影响。结果表明：随着施用量的增加,稻米产量增加,基施硒肥产量略高于叶面喷施硒肥,产量差为 2.115 g/pot,与对照(CK)相比,基施0.28%钙镁磷肥+0.12%硅藻土+0.004‰硒(T3)能够提高1.68倍的稻米产量;随着施用量的增加,pH升高,有效Cd降低,有机质与CEC变化不大;基施硒肥与叶面喷施硒肥处理对土壤pH、有机质与CEC差异不显著,但基施硒肥处理有效Cd含量略低于叶面喷施硒肥处理,T3对土壤Cd的钝化效果最佳;随着基施硒肥用量的增加,稻米Cd含量降低,随着叶面喷施硒肥用量的增加,稻米Cd含量先降低后升高,基施硒肥处理对稻米Cd的消减程度强于叶面喷施硒肥处理,相差 0.021 mg/kg,与对照(CK)相比,T3处理稻米Cd降低0.063 mg/kg。可见,硒对调控稻米镉累积具有重要作用,且基施硒肥强于叶面喷施。综上所述,基施0.28%钙镁磷肥+0.12%硅藻土+0.004‰硒对土壤Cd钝化与稻米Cd消减的效果最佳,值得在镉污染稻田推广应用。  相似文献   

施肥对海南省西华农场2龄橡胶树径围生长的影响     

黎辉  朱智强  赵春梅  刘志崴 《热带作物学报》2010,30(12):10-12

用7种配方肥料，在海南省西华农场上进行了为期1年的2年生橡胶树施肥试验。结果表明：不同施肥处理对胶树径围增长效应之间有极显著的差异。其中，处理6(施氧化镁0.4 kg/株)、处理8(施尿素0.6 kg/株、施过磷酸钙1.2 kg/株、施氧化镁0.4 kg/株、施干牛粪6 kg/株)与对照相比，差异极显著，分别比对照增长25.5%、26.4%；其余处理与对照相比，差异不显著，其中，单施尿素(0.6 kg/株)效果最差，单施氯化钾(0.4 kg/株)效果较差。  相似文献   

不同生物有机肥施肥方法对压砂西瓜生长及产量的影响   总被引：4，自引：0，他引：4  

谭军利  田军仓  李应海  王西娜 《干旱地区农业研究》2011,29(6):135-138

2009年在宁夏中卫香山乡采用田间试验的方法,比较了穴施和条施生物有机肥对压砂西瓜生长及产量的影响.结果表明:与条施生物有机肥相比,穴施条件下,西瓜生育前期叶面积指数增加了80％ ～ 119％；生育中后期主蔓长20.6 cm,增加25.4％；叶片数也较多；单瓜重增加了43％,中心糖含量和边糖含量分别提高了9％和8％；同...  相似文献   

Fertilizer value of nitrogen in hen and broiler manure after application to spring barley using different application timing     

S. Delin 《Soil Use and Management》2011,27(4):415-426

The nitrogen (N) fertilizer effect of layer hen and broiler manure applied at different times on spring barley yield was studied in seven Swedish field experiments during 2005–2008. Two experiments had parallel field incubations to study N release after fertilizer application. The effect of total N in manure on N offtake was 30–40% that of mineral N, except in a dry year, when the effect was very low. Although the relative proportions of ammonium N, uric acid N and other N differed between the hen and broiler manure, the effect of total N was similar for both. In field incubations, mineral N decreased from 75 to 60% of total N applied in hen manure, whereas it increased from 20 to 50% in broiler manure, because of net immobilization and release, respectively. The limited fertilizer nitrogen replacement value, corresponding to only 30–40% of total N, could be as a result of ammonia volatilization after rather shallow incorporation with harrow. Net N release from broiler manure lasted for 6–8 weeks after application, after which it generally ceased. In some cases, manure application in early spring gave better yield effects than application at sowing, probably because of better synchronization of the N release with crop N requirements. The residual N effect on the N offtake in crop in the year after manure application was on average 3% of the total N applied, equivalent to a fertilizer replacement value of about 6%.  相似文献   

油菜新品种宁杂1818氮肥运筹试验     

李锦霞  张瑛  李爱民  张洁夫  许美刚  陈书健 《湖北农业科学》2017,56(6)

以油菜(Brassica campestris L.)新品种宁杂1818为试验材料,以秦优7号为对照,研究不同氮肥运筹条件下,宁杂1818的植株长势和产量变化,旨在为深入了解宁杂1818的生长特性,建立宁杂1818高产、高效栽培技术体系提供理论依据。  相似文献   

Do combined applications of crop residues and inorganic fertilizer lower emission of N2O from soil?     

K. A. Frimpong  E. M. Baggs 《Soil Use and Management》2010,26(4):412-424

Emissions of N₂O were measured following addition of ¹⁵N‐labelled residues of tropical plant species [Vigna unguiculata (cowpea), Mucuna pruriens and Leucaena leucocephala] to a Ferric Luvisol from Ghana at a rate of 100 mg N/kg soil under controlled environment conditions. Residues were also applied in different ratio combinations with inorganic N fertilizer, at a total rate of 100 mg N/kg soil. N₂O emissions were increased after addition of residues, and further increased with combined (ratio) applications of residues and inorganic N fertilizer. However, ¹⁵N‐N₂O production was low and short‐lived in all treatments, suggesting that most of the measured N₂O‐N was derived from the applied fertilizer or native soil mineral N pools. There was no consistent trend in magnitude of emissions with increasing proportion of inorganic fertilizer in the application. The positive interactive effect between residue‐ and fertilizer‐N sources was most pronounced in the 25:75 Leucaena:fertilizer and cowpea:fertilizer treatments where 1082 and 1130 mg N₂O‐N/g residue were emitted over 30 days. N₂O (log_e) emission from all residue amended treatments was positively correlated with the residue C:N ratio, and negatively correlated with residue polyphenol content, polyphenol:N ratio and (lignin + polyphenol):N ratio, indicating the role of residue chemical composition in regulating emissions even when combined with inorganic fertilizer. The positive interactive effect in our treatments suggests that it is unlikely that combined applications of residues and inorganic fertilizer can lower N₂O emissions unless the residue is of very low quality promoting strong immobilisation of soil mineral N.  相似文献   

有机无机生物活性肥料施用技术对蔬菜作物生长及产量的影响   总被引：7，自引：0，他引：7  

倪治华 《土壤通报》2003,34(6):548-550

田间试验结果表明:施用有机无机生物活性肥料能明显提高蔬菜作物长势,提高甘蓝抗根腐和烂心病能力。在等氮条件下,与常规对照相比产量基本持平,差异并不显著;但每666.7m2可节约成本24元左右,幅度达30,7%。椐统计分析,甘蓝最佳施肥置以100kg/666,7m2为宜,此用量可比常规对照增产9.3%,每666.7m2增加收入295元。在施用总量不变的条件下,减少有机无机生物活性肥料基肥比例,甘蓝则有碱产趋势。  相似文献   

施用有机肥对当归药材性状、产量及抗病性的影响   总被引：1，自引：0，他引：1  

肖婉君  郭凤霞  陈垣  刘兰兰  陈永中  焦旭升  张碧全  白刚  金建琴 《草业学报》2021,30(3):189-199

为了探寻有机肥对当归成药栽培的影响,采用黑膜覆盖栽培,基施纯有机肥（O,2000 kg·hm^-2）、纯化肥（C,磷酸二铵,420 kg·hm^-2）、减半量化肥增施有机肥［1/2（O+C）］,以不施肥为对照（CK）,栽培期测定早期抽薹率、发病率、药材产量和性状指标。结果表明,纯有机肥栽培当归早期抽薹率为8.0%,分别较CK、1/2（O+C）和C降低19.4%、15.2%和7.1%。药材产量则相反,O、C和1/2（O+C）栽培当归药材产量相当,鲜产量分别较CK提高105.9%、84.6%和78.2%。纯有机肥栽培当归根最长,侧根最多,单根最重,药材产量最高。化肥对根的增粗作用最大,但含水量高,根病率高,发病重。不同施肥每hm²鲜药材产量与综合评价指数大小顺序一致,依次为O（9220.6 kg,0.926）>C（9038.5 kg,0.610）>1/2（O+C）（8728.4 kg,0.481）>CK（4897.4 kg,0.190）。每hm²干药材产量排序为O（3149.2 kg）>1/2（O+C）（3098.7 kg）>C（2909.2 kg）>CK（1707.0 kg）,与经济收益一致。在岷县道地产区黑膜覆盖栽培,纯施有机肥对当归药材具有显著增效作用,可有效降低早薹率、根病率和发病程度,改善药材性状,提高药材产量和质量,在当归标准化栽培中可推广应用,以改变当归依赖化肥的生产现状,促进绿色有机栽培。  相似文献