IMHE OpenIR  > Journal of Mountain Science  > Journal of Mountain Science-2016  > Vol13 No.4
Effect of potassium on soil conservation and productivity of maize/cowpea based crop rotations in the north-west Indian Himalayas
Birendra Nath GHOSH; Om Pal Singh KHOLA; Ranjan BHATTACHARYYA; Kuldeep Singh DADHWAL; Prasant Kumar MISHRA
Corresponding AuthorBirendra Nath GHOSH
2016-04
Source PublicationJournal of Mountain Science
ISSN1672-6316
Volume13Issue:4Pages:754-762
Subtype期刊论文
AbstractPlots under conservation tillage may require higher amount of potassium (K) application for augmenting productivity due to its stratification in upper soil layers, thereby reducing K supplying capacity in a medium or long-term period. To test this hypothesis, a field experiment was performed in 2002-2003 and 2006-2007 to study the effect of K and several crop rotations on yield, water productivity, carbon sequestration, grain quality, soil K status and economic benefits derived in maize (Zea mays L)/cowpea (Vigna sinensis L.) based cropping system under minimum tillage (MT).All crops recorded higher grain yield with a higher dose of K (120 kg K2O ha-1) than recommended K (40 kg K2O ha-1). The five years’ average yield data showed that higher K application (120 kg K2O ha-1) produced 16.4% (P<0.05) more maize equivalent yield. Cowpea based rotation yielded 14.2% (P<0.05) higher production than maize based rotation. The maximum enhancement was found in cowpea-mustard rotation. Relationshipbetween yield and sustainable indices revealed that only agronomic efficiency of fertilizer input was significantly correlated with yield. Similarly, higher doses of K application not only increased the water use efficiency (WUE) of all crops, but also reduced runoff and soil lossby 16.5% and 15.8% under maize and 23.3% and 19.7% under cowpea cover, respectively. This study also revealed that on an average 16.5% of left over carbon input contributed to soil organic carbon (SOC). Here, cowpea based rotation with the higher K application increased carbon sequestration in soil.Potassium fertilization also significantly improved the nutritional value of harvested grain by increasing the protein content for maize (by 9.5%) and cowpea (by 10.6%). The oil content in mustard increased by 5.0% and 6.0% after maize and cowpea, respectively. Net return also increased with the application of the higher K than recommended K and the trend was similar to yield. Hence, the present study demonstrated the potential yield and profit gains along with resource conservation in the Indian Himalayas due to annual additions of higher amount of K than the recommended dose. The impact of high K application was maximum in the cowpea-mustard rotation.
KeywordPotassium Application Crop Rotations Minimum Tillage Water Balance Runoff And Soil Loss Carbon Sequestration Soil k Status Net Return
DOI10.1007/s11629-013-2885-0
Indexed BySCI
Language英语
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Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/15051
CollectionJournal of Mountain Science_Journal of Mountain Science-2016_Vol13 No.4
Recommended Citation
GB/T 7714
Birendra Nath GHOSH,Om Pal Singh KHOLA,Ranjan BHATTACHARYYA,et al. Effect of potassium on soil conservation and productivity of maize/cowpea based crop rotations in the north-west Indian Himalayas[J]. Journal of Mountain Science,2016,13(4):754-762.
APA Birendra Nath GHOSH,Om Pal Singh KHOLA,Ranjan BHATTACHARYYA,Kuldeep Singh DADHWAL,&Prasant Kumar MISHRA.(2016).Effect of potassium on soil conservation and productivity of maize/cowpea based crop rotations in the north-west Indian Himalayas.Journal of Mountain Science,13(4),754-762.
MLA Birendra Nath GHOSH,et al."Effect of potassium on soil conservation and productivity of maize/cowpea based crop rotations in the north-west Indian Himalayas".Journal of Mountain Science 13.4(2016):754-762.
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