Badshah et al [11] reported that, DS produced more above ground

Badshah et al. [11] reported that, DS produced more above ground biomass than TP but that at maturity, both CTTP and NTDS had higher above ground biomass and NTTP was the lowest. Leaf area per tiller varied significantly among the treatments at all growth stages of the crop. It also varied significantly among the establishment methods at all sampling dates owing to high population density under DS resulting in increased mutual shading of plants [12] and a consequent acceleration

Olaparib mw in leaf senescence [13]. Leaf area gradually increased from Max. to HD stage and then decreased by 34% in CTTP and 45% in NTTP from 12DAH–24DAH but was similar (35%) for DS under either CT or NT. Leaf area was reduced more in NTTP than CTTP owing to early drying of plants resulting from the shallower root system under NT. This result agrees with that of Huang et al. [7]. Badshah et al. [11] reported that, LAI increased up to the BT stage under TP and the HD stage under DS under both CT and NT and then gradually declined up to 24DAH. CTTP had higher LAI than NTTP at all crop growth stages. Similarly, CTDS had higher LAI than NTDS. Grain yield is a function of biomass accumulation from heading to maturity and translocation to kernels of reserve pre-stored before heading [14]. It has often been suggested

that rice yield increase depends more Rebamipide on translocation

to kernels of biomass accumulated before heading than on biomass accumulation from heading to maturity [15] and [16]. CTTP and NTTP showed significantly higher find more number of spikelets per cm of panicle than CTDS and NTDS owing to excessive tillering leading to small panicle size and further reduced grain yield [3] and [4]. Panicle dry weight at MA was higher under TP than DS under either CT or NT owing to the sink/source relationship. TP had an approximately 12% longer and larger sink (heavier panicle) than DS. Increasing spikelet number per panicle may be a better approach to increase sink size [17] and [18] and sink size (spikelet number per unit land area) is the primary determinant of the rice yield [19]. Grain yield was higher in CTTP owing to a larger sink size (heavier panicle, more spikelets in per cm length of panicle) than under DS although weather parameters (temperature, sunshine hours and rainfall) were similar both in TP and in DS (Table 2). There was a positive correlation between panicle number and maximum tillers and NTTP always produced lower numbers of tillers than CTTP. However, PBTR was higher in NTTP than in CTTP, and both NTTP and CTTP had similar sinks (number of spikelet per cm of panicle). Increasing maximum tiller number in NTTP by increasing plant populations may increase rice yield.

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