Results 31 to 40 of about 6,248 (154)
Shuitu Baochi Xuebao, 2007 用盆栽试验研究了外源氟对潮土、黄棕壤pH、容重、玉米干物重和吸钾量的影响,结果表明：氟可以提高土壤pH,使土壤结块,容重增加,孔隙度减少,加入氟1000 mg/kg,黄棕壤和潮土pH分别比对照增加了0.77和0.52,土壤容重分别增加了26.98%和27.72%。氟对潮土过氧化氢酶活性没有影响,加入氟600 mg/kg,氟对黄棕壤过氧化氢酶活性产生明显抑制作用;氟对黄棕壤碱性磷酸酶活性无影响,氟400 mg/kg对潮土碱性磷酸酶活性产生明显抑制。加入氟600 mg/kg,土壤中性磷酸酶活性明显降低 ...
于群英, 李粉茹, 慈恩
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, 2011 MP4 video‘Flower ‘u dum ba ri’ was told by Don drug in A mdo Tibetan. Rta rgyugs, a subdivision of Rka phug Administrative Village, is a farming village located in Khams ra Town, Gcan tsa County Town, Rma lho Tibetan Autonomous Prefecture, Qinghai ...
Rdo rje don 'grub
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, 2011 MP4 video‘Rabbit and Wolf’ was told by Rgyal mtshan in A mdo Tibetan. Rta rgyugs, a subdivision of Rka phug Administrative Village, is a farming village located in Khams ra Town, Gcan tsa County Town, Rma lho Tibetan Autonomous Prefecture, Qinghai ...
Rdo rje don 'grub
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Shuitu Baochi Xuebao, 2021 探讨控释氮肥全量基施对旱地玉米干物质积累与转运、产量和水肥利用效率的影响，为建立高效旱地玉米一次性氮肥全量施用和轻简化栽培技术提供支撑。2016—2019年在甘肃省东部黄土旱塬区连续4年设置大田定位试验，研究不同用量控释氮肥全量基施对旱地玉米产量、水肥利用效率及干物质积累与转运规律的影响。结果表明：与普通氮肥相比，相同用量的控释氮肥全量基施有利于提高玉米叶片叶绿素相对含量（SPAD值），增加干物质积累量，提高灌浆期茎鞘和叶片干物质输出率和贡献率。无论何种降雨年型，施用控释氮肥均能优化玉米产量构成 ...
张建军 +5 more
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, 2011 MP4 video‘Two Brothers’ was told by Jo skyabs in A mdo Tibetan. Rta rgyugs, a subdivision of Rka phug Administrative Village, is a farming village located in Khams ra Town, Gcan tsa County Town, Rma lho Tibetan Autonomous Prefecture, Qinghai Province,
Rdo rje don 'grub
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Shuitu Baochi Xuebao, 2020 于2017—2019年在吉林省农安县设置大田试验，采用双因素裂区设计，主区为秸秆还田J（12 000 kg/hm2）、秸秆不还田W，副区为施镁M3（施纯镁10 kg/hm2）、不施镁M0，包含JM3（秸秆+镁肥）、JM0（秸秆+无镁肥）、WM3（无秸秆+镁肥）、WM0（常规）4个处理。结果表明：玉米生育期，土壤交换镁含量逐渐降低，至成熟期，JM3处理土壤交换镁含量比WM3、JM0、WM0分别提高6.59%，8.47%，14.09%。施用镁肥促进玉米植株对镁素养分的吸收 ...
张美玲 +5 more
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Painter Kun dga’ and Carpenter Kun dga’ [PDF]
, 2011 MP4 video‘Painter Kun dga’ and Carpenter Kun dga’’ was told by Rgyal mtshan in A mdo Tibetan. Rta rgyugs, a subdivision of Rka phug Administrative Village, is a farming village located in Khams ra Town, Gcan tsa County Town, Rma lho Tibetan Autonomous
Rdo rje don 'grub
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Shuitu Baochi Xuebao, 2019 为研究间作对土壤侵蚀的调控机制，采用人工模拟降雨方法分析了生育期内玉米马铃薯间作及起垄在不同降雨强度（40，80 mm/h）和坡度（10°，15°）下的降雨入渗规律。结果表明：（1）生育期内同一坡度同一降雨条件下玉米马铃薯间作的降雨入渗结束时间比单作玉米推迟，入渗开始时间差别不明显）玉米马铃薯间作的入渗量高于单作玉米（P0.05）。生育期内40，80 mm/h雨强下间作的入渗量比单作玉米分别增加了25.75%~69.07%和21.76%~50.95%。同一雨强下间作的入渗速率高于单作玉米 ...
欧阳铖人 +3 more
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Uncle Dunba Frightens Thieves [PDF]
, 2011 avi video‘Uncle Dunba Frightens Thieves’ was told by Rgyal mtshan in A mdo Tibetan. Rta rgyugs, a subdivision of Rka phug Administrative Village, is a farming village located in Khams ra Town, Gcan tsa County Town, Rma lho Tibetan Autonomous ...
Rdo rje don 'grub
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Shuitu Baochi Xuebao, 2018 通过田间试验研究了不同作物轮作模式中生物质、粗蛋白生产潜力和氨排放，以探讨粮改饲进程中较优的种植模式。以冬小麦—夏玉米（W-SuM）轮作为基准，探讨了华北地区黑麦草—夏玉米（R-SuM）、黑麦草—春玉米（R-SpM）、黑麦草—双季玉米（R-DM）和双季玉米(DM) 4种轮作体系的干物质、粗蛋白的生产潜力和氨气排放。结果表明：黑麦草—双玉米轮作模式较好，干物质年产量和粗蛋白含量分别达到31 012，2 529 kg/hm2，比常规冬小麦—夏玉米体系分别增加了14.3%，8.2 ...
杨 羚 +5 more
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