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Wheat residue mulch and anti-transpirants improve productivity and quality of rainfed soybean in semi-arid north-Indian plains

机译:小麦残渣覆盖物和防蛀剂提高了半干旱北印度平原雨水大豆的生产力和质量

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摘要

Soybean (Glycine max L. Marc.) is largely grown in moisture-stressed conditions resulting in low yield. A 3-year field experiment was conducted during rainy seasons of 2012-2014 to determine: (i) the effects of straw mulches and anti-transpirants on soil moisture retention, rainwater-use efficiency (RWUE), photosynthesis, growth, yield, and quality of soybean (cv. PS 1347), and (ii) the influence of climate (year) on responses of soybean to straw mulch and anti-transpirant application. The treatments included two mulching treatments, no-mulch and wheat residue mulch (at 5 Mg ha(-1)), and the use of anti-transpirants, MgCO3 (5%), glycerol (5%), Na2CO3 (2%), KNO3 (1%) and no-anti-transpirant (control) sprayed 15 days after flower initiation. Wheat straw mulching enhanced surface soil (0-30 cm) moisture content by 20% over plots under no-mulch, improved leaf SPAD (soil plant analysis development) values, net-photosynthetic rates and boosted soybean grain yield by similar to 16% over no mulching. Plots with wheat straw mulching also had similar to 18, 18 and 17% higher protein yield, oil yield and RWUE compared with no-mulch plots. Spraying MgCO3 and KNO3 along with wheat residue mulching (5 Mg ha(-1)) caused significant enhancement in grain-and protein-yield, and RWUE over control. However, Na2CO3 was not a suitable anti-transpirant as it reduced soybean growth, yield and quality. These results suggest that wheat residue mulch and anti-transpirants, MgCO3 and KNO3, can significantly improve the yield and quality of soybean in moisture-stressed rainfed environments.
机译:大豆(Glycine Max L.Marc。)大大种植在耐水湿性条件下,导致产量低。在2012 - 2014年的雨季进行了一个3年的野外实验,以确定:(i)秸秆覆盖物和抗转铁孔对土壤水分保留,雨水利用效率(rwue),光合作用,生长,产量和的影响大豆质量(CV.PS 1347),(ii)气候(年)对大豆对秸秆覆盆子和抗转致应用的影响。该处理包括两种覆盖物处理,无覆盖物和小麦残留物覆盖物(在5mg ha(-1)),以及使用抗转发剂,MgCO 3(5%),甘油(5%),Na 2 CO 3(2%) ,KNO3(1%)和无抗转蒸气剂(对照)在花开始后15天喷洒。小麦秸秆覆盖增强的表面土壤(0-30厘米)水分含量在无覆盖下的图中含20%,改善的叶子·皮带(土厂分析开发)值,净光合速率和提升大豆籽粒产量与16%相似没有覆盖。与无覆盖图相比,具有小麦秸秆覆盖物的蛋白质产量,油产量和rwue也类似的蛋白质产量。喷涂MgCO3和KNO3以及小麦残留物(5mg HA(-1))引起晶粒和蛋白质产量的显着增强,以及对照的rwue。然而,Na 2 CO 3不是合适的抗转球剂,因为它降低了大豆生长,产量和质量。这些结果表明,小麦残渣覆盖物和抗转铁孔,MgCO3和KnO3可以显着提高水分压力雨量环境中大豆的产量和质量。

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