ABSTRACT The present studies were conducted to evaluate the effect of different nutrient management practices under two tillage options in wheat. The experiments were laid out in split-plot design with a combination of two varieties (WH 1105 and HD 2967) and two tillage options (Conventional and No tillage) in the main plot and six precision nutrient management practices [absolute control, site-specific nutrient management with Nutrient Expert for wheat (SSNM-NE)(170 kg nitrogen (N)/ha), SSNM NE+GreenSeeker (GS)(153/158 N kg/ha), N120 (120 kg N/ha) before irrigation, N120 after irrigation and N Rich (180 kg N/ha)] in subplot replicated thrice. The grain yield and quality characters in no tillage (NT) and conventional tillage (CT) were similar but agronomic efficiency was higher in NT. Both the varieties (WH 1105 and HD 2967) gave similar grain yield and quality. Wheat variety WH 1105 recorded significantly higher sodium dodecyl sulfate sedimentation (SDS) and gluten index. The treatment SSNM NE+GS had resulted in 107.1% higher grain yield than no nitrogen control but similar to enriched N plot (180 kg N/ha). The grain protein, SDS and gluten index in need-based nutrient management (SSNM+GS) treatment were found to be similar as recorded in SSNM-NE (170 kgN/ha) and N enriched plot (180 kg N ha−1). The agronomic efficiency and recovery efficiency in SSNM+GS were also better than SSNM NE.

中文翻译：

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精准养分管理对小麦产量、氮素利用效率和耕作强度的影响

摘要 本研究旨在评估小麦在两种耕作方式下不同养分管理措施的效果。试验采用裂区设计，在主小区结合两种品种（WH 1105 和 HD 2967）和两种耕作方式（常规耕作和免耕）和六种精确的养分管理实践 [绝对控制、特定地点灌溉前与小麦营养专家 (SSNM-NE)(170 kg 氮 (N)/ha)、SSNM NE+GreenSeeker (GS)(153/158 N kg/ha)、N120 (120 kg N/ha) 进行营养管理，灌溉后的 N120 和 N Rich (180 kg N/ha)] 重复三次。免耕（NT）和常规耕作（CT）的谷物产量和品质特征相似，但农艺效率更高。这两个品种（WH 1105 和 HD 2967）的谷物产量和质量相似。小麦品种 WH 1105 记录了显着更高的十二烷基硫酸钠沉淀 (SDS) 和面筋指数。SSNM NE+GS 处理的谷物产量比无氮处理高 107.1%，但与富氮地块（180 kg N/ha）相似。发现基于需求的营养管理 (SSNM+GS) 处理中的谷物蛋白质、SDS 和面筋指数与 SSNM-NE (170 kgN/ha) 和富氮地块 (180 kg N ha-1) 中记录的相似。SSNM+GS的农艺效率和恢复效率也优于SSNM NE。谷物产量比无氮控制高 1%，但类似于富氮地块 (180 kg N/ha)。发现基于需求的营养管理 (SSNM+GS) 处理中的谷物蛋白质、SDS 和面筋指数与 SSNM-NE (170 kgN/ha) 和富氮地块 (180 kg N ha-1) 中记录的相似。SSNM+GS的农艺效率和恢复效率也优于SSNM NE。谷物产量比无氮控制高 1%，但类似于富氮地块 (180 kg N/ha)。发现基于需求的营养管理 (SSNM+GS) 处理中的谷物蛋白质、SDS 和面筋指数与 SSNM-NE (170 kgN/ha) 和富氮地块 (180 kg N ha-1) 中记录的相似。SSNM+GS的农艺效率和恢复效率也优于SSNM NE。